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Warning: Cannot modify header information - headers already sent in /usr/local/www/mediawiki/includes/WebResponse.php on line 38 http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=GifshuffleGifshuffle - Revision history2024-12-27T15:29:14ZRevision history for this page on the wikiMediaWiki 1.19.2 Warning: require(): Unable to allocate memory for pool. in /usr/local/www/mediawiki/includes/AutoLoader.php on line 1007
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|subcat=Encryption</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|subcat=Encryption</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|subcat2=Steganography</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|subcat2=Steganography</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;">|released=1998</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td></tr>
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</table>Parchivisthttp://fileformats.archiveteam.org/index.php?title=Gifshuffle&diff=46301&oldid=prevParchivist at 03:03, 9 November 20232023-11-09T03:03:59Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'> </td><td style="background: #eee; 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: #ffa; color:black; font-size: smaller;"><div>'''gifshuffle''' conceals messages in [[GIF]] images by shuffling the colourmap, which leaves the image visibly unchanged. gifshuffle works with all GIF images, including those with transparency and animation, and in addition provides compression and encryption (using the [[ICE (encryption algorithm)|ICE]] encryption algorithm) of the concealed message.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>'''gifshuffle''' <ins class="diffchange diffchange-inline">by Matthew Kwan </ins>conceals messages in [[GIF]] images by shuffling the colourmap, which leaves the image visibly unchanged. gifshuffle works with all GIF images, including those with transparency and animation, and in addition provides compression and encryption (using the [[ICE (encryption algorithm)|ICE]] encryption algorithm) of the concealed message.</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>Any list of n items can be sorted n! ways, meaning that any particular ordering can represent a number in the range [0, n!-1]. This number can in turn store approximately log2(n!) bits of information. Thus, a GIF image with 256 colours can store up to 1683 bits (210 bytes) of information by shuffling the colours in its colourmap.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Any list of n items can be sorted n! ways, meaning that any particular ordering can represent a number in the range [0, n!-1]. This number can in turn store approximately log2(n!) bits of information. Thus, a GIF image with 256 colours can store up to 1683 bits (210 bytes) of information by shuffling the colours in its colourmap.</div></td></tr>
</table>Parchivisthttp://fileformats.archiveteam.org/index.php?title=Gifshuffle&diff=46300&oldid=prevParchivist at 01:50, 9 November 20232023-11-09T01:50:10Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Any list of n items can be sorted n! ways, meaning that any particular ordering can represent a number in the range [0, n!-1]. This number can in turn store approximately log2(n!) bits of information. Thus, a GIF image with 256 colours can store up to 1683 bits (210 bytes) of information by shuffling the colours in its colourmap.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Any list of n items can be sorted n! ways, meaning that any particular ordering can represent a number in the range [0, n!-1]. This number can in turn store approximately log2(n!) bits of information. Thus, a GIF image with 256 colours can store up to 1683 bits (210 bytes) of information by shuffling the colours in its colourmap.</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;">v2.0 Changes involve tweaks to a few GIF encoding characteristics, plus an improvement to the way encrypted messages are encoded (Encryption is also applied to the ordering of the colours in the colourmap. Instead of using their "natural" ordering, the ordering of their encrypted hash is used. This has the benefit of making colourmaps look random even when there is only a small message concealed). These should further reduce the chances of concealed messages being detected. The -1 option forces v2.0 to produce files compatible with v1</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;"></ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>== Links ==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://darkside.com.au/gifshuffle/index.html gifshuffle homepage]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://darkside.com.au/gifshuffle/index.html gifshuffle homepage]</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;">* [https://dl.packetstormsecurity.net/crypt/stego/gifshuffle/gswin.zip v1.1]</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;">* [https://dl.packetstormsecurity.net/crypt/stego/gifshuffle/gifshuf.zip v1.1 source code]</ins></div></td></tr>
</table>Parchivisthttp://fileformats.archiveteam.org/index.php?title=Gifshuffle&diff=45039&oldid=prevJsummers at 15:58, 28 August 20232023-08-28T15:58:05Z<p></p>
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<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>'''gifshuffle''' conceals messages in GIF images by shuffling the colourmap, which leaves the image visibly unchanged. gifshuffle works with all GIF images, including those with transparency and animation, and in addition provides compression and encryption (using the [[ICE (encryption algorithm)|ICE]] encryption algorithm) of the concealed message.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>'''gifshuffle''' conceals messages in <ins class="diffchange diffchange-inline">[[</ins>GIF<ins class="diffchange diffchange-inline">]] </ins>images by shuffling the colourmap, which leaves the image visibly unchanged. gifshuffle works with all GIF images, including those with transparency and animation, and in addition provides compression and encryption (using the [[ICE (encryption algorithm)|ICE]] encryption algorithm) of the concealed message.</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>Any list of n items can be sorted n! ways, meaning that any particular ordering can represent a number in the range [0, n!-1]. This number can in turn store approximately log2(n!) bits of information. Thus, a GIF image with 256 colours can store up to 1683 bits (210 bytes) of information by shuffling the colours in its colourmap.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Any list of n items can be sorted n! ways, meaning that any particular ordering can represent a number in the range [0, n!-1]. This number can in turn store approximately log2(n!) bits of information. Thus, a GIF image with 256 colours can store up to 1683 bits (210 bytes) of information by shuffling the colours in its colourmap.</div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=Gifshuffle&diff=45012&oldid=prevParchivist: Created page with "{{FormatInfo |formattype=electronic |subcat=Encryption |subcat2=Steganography }} '''gifshuffle''' conceals messages in GIF images by shuffling the colourmap, which leaves the..."2023-08-27T21:41:39Z<p>Created page with "{{FormatInfo |formattype=electronic |subcat=Encryption |subcat2=Steganography }} '''gifshuffle''' conceals messages in GIF images by shuffling the colourmap, which leaves the..."</p>
<p><b>New page</b></p><div>{{FormatInfo<br />
|formattype=electronic<br />
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|subcat2=Steganography<br />
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<br />
'''gifshuffle''' conceals messages in GIF images by shuffling the colourmap, which leaves the image visibly unchanged. gifshuffle works with all GIF images, including those with transparency and animation, and in addition provides compression and encryption (using the [[ICE (encryption algorithm)|ICE]] encryption algorithm) of the concealed message.<br />
<br />
Any list of n items can be sorted n! ways, meaning that any particular ordering can represent a number in the range [0, n!-1]. This number can in turn store approximately log2(n!) bits of information. Thus, a GIF image with 256 colours can store up to 1683 bits (210 bytes) of information by shuffling the colours in its colourmap.<br />
<br />
== Links ==<br />
* [https://darkside.com.au/gifshuffle/index.html gifshuffle homepage]</div>Parchivist Warning: require(): Unable to allocate memory for pool. in /usr/local/www/mediawiki/includes/AutoLoader.php on line 1007
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