http://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&feed=atom&action=historySDN (SDN Project) - Revision history2024-03-29T12:53:54ZRevision history for this page on the wikiMediaWiki 1.19.2http://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&diff=44287&oldid=prevJsummers at 20:17, 13 March 20232023-03-13T20:17:55Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] → "SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]], and [[FSecure (PaceSoft)|FSecure]] by PaceSoft.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] → "SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]], and [[FSecure (PaceSoft)|FSecure]] by PaceSoft.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>ARJ v2.39c (early 1993) simultaneously changed ARJ's native "security envelope" format, and claimed to <del class="diffchange diffchange-inline">introduce </del>"SDN support". This is confusing, because <del class="diffchange diffchange-inline">these </del>two <del class="diffchange diffchange-inline">similar </del>features <del class="diffchange diffchange-inline">are not really related (though SDN files might well use both).</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>ARJ v2.39c (early 1993) simultaneously changed ARJ's native "security envelope" format, and claimed to <ins class="diffchange diffchange-inline">add </ins>"SDN support". This is confusing, because <ins class="diffchange diffchange-inline">there are </ins>two <ins class="diffchange diffchange-inline">different security </ins>features <ins class="diffchange diffchange-inline">involved here: </ins>ARJ <ins class="diffchange diffchange-inline">security envelopes, and the FSecure security seals associated with </ins>SDN. <ins class="diffchange diffchange-inline">It is not clear what feature the </ins>claimed "SDN support" <ins class="diffchange diffchange-inline">is </ins>referring to<ins class="diffchange diffchange-inline">. ARJ does not </ins>do <ins class="diffchange diffchange-inline">anything with FSecure security seals, though its documentation discusses them</ins>.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div> </div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">And </del>ARJ <del class="diffchange diffchange-inline">doesn't actually fully validate </del>SDN<del class="diffchange diffchange-inline">-secured files</del>. <del class="diffchange diffchange-inline">The </del>claimed "SDN support" <del class="diffchange diffchange-inline">appears to be </del>referring to <del class="diffchange diffchange-inline">some convenience features related to identifying SDN files as such, and telling the user what to </del>do.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>ARJ format:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>ARJ format:</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* <del class="diffchange diffchange-inline">{{CdTextfiles|megmonster/LAN/FILETST1.ZIP|FileTest v1.00}} (Validator</del>, <del class="diffchange diffchange-inline">DOS binary)</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* <ins class="diffchange diffchange-inline">For extraction</ins>, <ins class="diffchange diffchange-inline">see </ins>[[ARJ#Software]].</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">* See also </del>[[ARJ#Software]] <del class="diffchange diffchange-inline">(ARJ v2</del>.<del class="diffchange diffchange-inline">39c+</del>)</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* For validation, see [[FSecure (PaceSoft</ins>)<ins class="diffchange diffchange-inline">#Software]].</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/SDN1__793 SDN1 Plus] (CD-ROM)</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/SDN1__793 SDN1 Plus] (CD-ROM)</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">(Wanted: </del>ARJ-<del class="diffchange diffchange-inline">SDN samples</del>.<del class="diffchange diffchange-inline">)</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>ARJ <ins class="diffchange diffchange-inline">format:</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* [https://archive.org/details/mediashare-08 MediaShare 8] → misc/storyv22.sdn </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* [https://archive.org/details/aolfile-7500 AOL File Library - 7500 to 7599 series] → 7500/Bible Study Programs/Bible Slide Show/ISRAEL20.sdn </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* [https://archive.org/details/aol-file-protocol-4400-5001-to-5044 aol file protocol 4400 5001-to</ins>-<ins class="diffchange diffchange-inline">5044] → AOLDLs/Religion Graphics Library/Kids Color Book/SCOLOR33</ins>.<ins class="diffchange diffchange-inline">sdn</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&diff=42937&oldid=prevJsummers: /* Discussion */ Reorganized2022-07-10T15:20:43Z<p><span dir="auto"><span class="autocomment">Discussion: </span> Reorganized</span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Discussion ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Discussion ==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>There are at least two or three different SDN formats.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>There are at least two or three different SDN formats.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">=== PAK-based format ===</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">The original format is a [[PAK (ARC extension)|PAK]] file with a special ''extended record''. PAK itself is a variant of [[ARC (compression format)|ARC]].</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">=== SDNV format ===</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The documentation for the ''SDNV'' utility says:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The documentation for the ''SDNV'' utility says:</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>must use a the  SDNV utility SDNV.EXE. [...]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>must use a the  SDNV utility SDNV.EXE. [...]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div></pre></div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div></pre></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">The older format is a [[PAK (ARC extension)|PAK]] file with a special ''extended record''. PAK itself is a variant of [[ARC (compression format)|ARC]].</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>More research is needed, but it seems possible that the plan to switch to SDNV format was abandoned.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>More research is needed, but it seems possible that the plan to switch to SDNV format was abandoned.</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&diff=42751&oldid=prevJsummers at 17:27, 4 June 20222022-06-04T17:27:39Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== ARJ-based format ===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=== ARJ-based format ===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] <del class="diffchange diffchange-inline">- </del>"SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]], and [[FSecure (PaceSoft)|FSecure]] by PaceSoft.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] <ins class="diffchange diffchange-inline">→ </ins>"SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]], and [[FSecure (PaceSoft)|FSecure]] by PaceSoft.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>ARJ v2.39c (early 1993) simultaneously changed <del class="diffchange diffchange-inline">it </del>native "security envelope" format, and claimed to introduce "SDN support". This is confusing, because these two similar features are not really related (though SDN files might well use both).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>ARJ v2.39c (early 1993) simultaneously changed <ins class="diffchange diffchange-inline">ARJ's </ins>native "security envelope" format, and claimed to introduce "SDN support". This is confusing, because these two similar features are not really related (though SDN files might well use both).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>And ARJ doesn't actually fully validate SDN-secured files. The claimed "SDN support" appears to be referring to some convenience features related to identifying SDN files as such, and telling the user what to do.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>And ARJ doesn't actually fully validate SDN-secured files. The claimed "SDN support" appears to be referring to some convenience features related to identifying SDN files as such, and telling the user what to do.</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&diff=42748&oldid=prevJsummers at 17:16, 4 June 20222022-06-04T17:16:48Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>An '''.SDN file''' is a compressed archive file associated with the ''SDN Project'' organization, and the ''SDNet/Works!'' software distribution network. ''SDN'' stands for ''Shareware Distribution Network''. SDN files are cryptographically authenticated.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>An '''.SDN file''' is a compressed archive file associated with the ''SDN Project'' organization, and the ''SDNet/Works!'' software distribution network. ''SDN'' stands for ''Shareware Distribution Network''. SDN files are cryptographically authenticated.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>An SDN file might be accompanied by an .SDA "abstract" file<del class="diffchange diffchange-inline">, which </del>is apparently just a text file describing the software in the SDN file.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>An SDN file might be accompanied by<ins class="diffchange diffchange-inline">, or might contain, </ins>an <ins class="diffchange diffchange-inline">'''</ins>.SDA<ins class="diffchange diffchange-inline">''' </ins>"abstract" file<ins class="diffchange diffchange-inline">. This </ins>is apparently just a text file describing the software in the SDN file.</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Discussion ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Discussion ==</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>More research is needed, but it seems possible that the plan to switch to SDNV format was abandoned.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>More research is needed, but it seems possible that the plan to switch to SDNV format was abandoned.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">In 1993, it was announced<ref>[http://www.textfiles.com/fidonet</del>-<del class="diffchange diffchange-inline">on-the-internet/939495/fido1004.txt fido1004.txt] - "SDN Changing Compression and Security"</ref> that SDN files would switch to a </del>format <del class="diffchange diffchange-inline">based on [[ARJ]].</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">=== ARJ</ins>-<ins class="diffchange diffchange-inline">based </ins>format <ins class="diffchange diffchange-inline">===</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>ARJ v2.<del class="diffchange diffchange-inline">41 </del>(early 1993) <del class="diffchange diffchange-inline">introduced "SDN support". We've seen some ARJ files that use the SDN </del>"security envelope" <del class="diffchange diffchange-inline">feature</del>, <del class="diffchange diffchange-inline">but they have a </del>.<del class="diffchange diffchange-inline">ARJ file extension</del>, not <del class="diffchange diffchange-inline">.</del>SDN. <del class="diffchange diffchange-inline">It</del>'<del class="diffchange diffchange-inline">s unclear if the </del>.SDN <del class="diffchange diffchange-inline">file extension was ever routinely used for the </del>SDN<del class="diffchange diffchange-inline">-ARJ format</del>, <del class="diffchange diffchange-inline">though </del>the <del class="diffchange diffchange-inline">ARJ documentation suggests that it was</del>.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] - "SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]], and [[FSecure (PaceSoft)|FSecure]] by PaceSoft.</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>ARJ v2.<ins class="diffchange diffchange-inline">39c </ins>(early 1993) <ins class="diffchange diffchange-inline">simultaneously changed it native </ins>"security envelope" <ins class="diffchange diffchange-inline">format</ins>, <ins class="diffchange diffchange-inline">and claimed to introduce "SDN support"</ins>. <ins class="diffchange diffchange-inline">This is confusing</ins>, <ins class="diffchange diffchange-inline">because these two similar features are </ins>not <ins class="diffchange diffchange-inline">really related (though </ins>SDN <ins class="diffchange diffchange-inline">files might well use both)</ins>.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">And ARJ doesn</ins>'<ins class="diffchange diffchange-inline">t actually fully validate SDN-secured files</ins>. <ins class="diffchange diffchange-inline">The claimed "</ins>SDN <ins class="diffchange diffchange-inline">support" appears to be referring to some convenience features related to identifying </ins>SDN <ins class="diffchange diffchange-inline">files as such</ins>, <ins class="diffchange diffchange-inline">and telling </ins>the <ins class="diffchange diffchange-inline">user what to do</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 43:</td>
<td colspan="2" class="diff-lineno">Line 47:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>ARJ format:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>ARJ format:</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* See [[ARJ#Software]].</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">* {{CdTextfiles|megmonster/LAN/FILETST1.ZIP|FileTest v1.00}} (Validator, DOS binary)</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* See <ins class="diffchange diffchange-inline">also </ins>[[ARJ#Software]] <ins class="diffchange diffchange-inline">(ARJ v2</ins>.<ins class="diffchange diffchange-inline">39c+)</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 51:</td>
<td colspan="2" class="diff-lineno">Line 56:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/SDN1__793 SDN1 Plus] (CD-ROM)</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/SDN1__793 SDN1 Plus] (CD-ROM)</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>ARJ <del class="diffchange diffchange-inline">format:</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">(Wanted: </ins>ARJ<ins class="diffchange diffchange-inline">-SDN samples</ins>.<ins class="diffchange diffchange-inline">)</ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">* {{CdTextfilesURL|goldmedal/}} → </del>.<del class="diffchange diffchange-inline">../*.ARJ</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&diff=38040&oldid=prevDan Tobias at 23:33, 25 September 20202020-09-25T23:33:03Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Security]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Security]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:Encryption]]</ins></div></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&diff=37478&oldid=prevJsummers at 20:24, 15 August 20202020-08-15T20:24:23Z<p></p>
<table class='diff diff-contentalign-left'>
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<td colspan='2' style="background-color: white; color:black;">Revision as of 20:24, 15 August 2020</td>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>An '''.SDN file''' is a compressed archive file associated with the ''SDN Project'' organization, and the ''SDNet/Works!'' software distribution network. ''SDN'' stands for ''Shareware Distribution Network''. SDN files are cryptographically authenticated.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>An '''.SDN file''' is a compressed archive file associated with the ''SDN Project'' organization, and the ''SDNet/Works!'' software distribution network. ''SDN'' stands for ''Shareware Distribution Network''. SDN files are cryptographically authenticated.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>An SDN file might be accompanied by an .SDA "abstract" file, which is just a text file describing the software in the SDN file.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>An SDN file might be accompanied by an .SDA "abstract" file, which is <ins class="diffchange diffchange-inline">apparently </ins>just a text file describing the software in the SDN file.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Discussion ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Discussion ==</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>There are at least two<del class="diffchange diffchange-inline">, and possibly </del>three<del class="diffchange diffchange-inline">, </del>different SDN formats.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>There are at least two <ins class="diffchange diffchange-inline">or </ins>three different SDN formats.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The documentation for the ''SDNV'' utility says:</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The documentation for the ''SDNV'' utility says:</div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 30:</td>
<td colspan="2" class="diff-lineno">Line 30:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>More research is needed, but it seems possible that the plan to switch to SDNV format was abandoned.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>More research is needed, but it seems possible that the plan to switch to SDNV format was abandoned.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] - "SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]]. <del class="diffchange diffchange-inline">More research is needed here</del>, <del class="diffchange diffchange-inline">as well</del>.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] - "SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]].</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">ARJ v2.41 (early 1993) introduced "SDN support". We've seen some ARJ files that use the SDN "security envelope" feature</ins>, <ins class="diffchange diffchange-inline">but they have a .ARJ file extension, not .SDN. It's unclear if the .SDN file extension was ever routinely used for the SDN-ARJ format, though the ARJ documentation suggests that it was</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 48:</td>
<td colspan="2" class="diff-lineno">Line 50:</td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* {{CdTextfiles|20mnn/APPLICAT/DRAFT.SDN|DRAFT.SDN}}</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* {{CdTextfiles|20mnn/APPLICAT/DRAFT.SDN|DRAFT.SDN}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/SDN1__793 SDN1 Plus] (CD-ROM)</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/SDN1__793 SDN1 Plus] (CD-ROM)</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">ARJ format:</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* {{CdTextfilesURL|goldmedal/}} → .../*.ARJ</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== References ==</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=SDN_(SDN_Project)&diff=36056&oldid=prevJsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Archiving |extensions={{ext|sdn}}, {{ext|sda}} |released=1989 }} An '''.SDN file''' is a compressed archive file associated with th..."2020-06-28T14:23:49Z<p>Created page with "{{FormatInfo |formattype=electronic |subcat=Archiving |extensions={{ext|sdn}}, {{ext|sda}} |released=1989 }} An '''.SDN file''' is a compressed archive file associated with th..."</p>
<p><b>New page</b></p><div>{{FormatInfo<br />
|formattype=electronic<br />
|subcat=Archiving<br />
|extensions={{ext|sdn}}, {{ext|sda}}<br />
|released=1989<br />
}}<br />
An '''.SDN file''' is a compressed archive file associated with the ''SDN Project'' organization, and the ''SDNet/Works!'' software distribution network. ''SDN'' stands for ''Shareware Distribution Network''. SDN files are cryptographically authenticated.<br />
<br />
An SDN file might be accompanied by an .SDA "abstract" file, which is just a text file describing the software in the SDN file.<br />
<br />
== Discussion ==<br />
There are at least two, and possibly three, different SDN formats.<br />
<br />
The documentation for the ''SDNV'' utility says:<br />
<br />
<pre><br />
SDN FILES BEFORE JUNE 15TH 1990.........................................<br />
Files with a .SDN extension that were packaged before June 15th 1990<br />
were compressed using NoGate Consulting's PAK v2.10 utility. [...]<br />
<br />
SDN FILES AFTER JUNE 15TH 1990..........................................<br />
All files and programs, released for distribution on SDNet/Works! after<br />
June 15th 1990 will be secured and compressed in SDNV format. Other<br />
archivers will not be able to read or uncompress these .SDN files. You<br />
must use a the SDNV utility SDNV.EXE. [...]<br />
</pre><br />
<br />
The older format is a [[PAK (ARC extension)|PAK]] file with a special ''extended record''. PAK itself is a variant of [[ARC (compression format)|ARC]].<br />
<br />
More research is needed, but it seems possible that the plan to switch to SDNV format was abandoned.<br />
<br />
In 1993, it was announced<ref>[http://www.textfiles.com/fidonet-on-the-internet/939495/fido1004.txt fido1004.txt] - "SDN Changing Compression and Security"</ref> that SDN files would switch to a format based on [[ARJ]]. More research is needed here, as well.<br />
<br />
== Software ==<br />
PAK format:<br />
* {{CdTextfiles|simtel/simtel20/MSDOS/ARCHIVRS/PAK251.EXE|PAK v2.51}} (DOS binary)<br />
* See also [[PAK (ARC extension)#Software]].<br />
<br />
SDNV format:<br />
* [https://www.sac.sk/download/pack/sdnv100.zip SDNV v1.00] (DOS binary)<br />
<br />
ARJ format:<br />
* See [[ARJ#Software]].<br />
<br />
== Sample files ==<br />
PAK format:<br />
* {{CdTextfilesURL|wildcatgold/sdn/}}<br />
* {{CdTextfiles|20mnn/APPLICAT/DRAFT.SDN|DRAFT.SDN}}<br />
* [https://archive.org/details/SDN1__793 SDN1 Plus] (CD-ROM)<br />
<br />
== References ==<br />
<references /><br />
<br />
[[Category:Security]]</div>Jsummers