Pre-2017 Skype chatsync

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File Format
Name Pre-2017 Skype chatsync
Ontology
Extension(s) .dat
Released 2003[1]

Before a change some time in or before 2017[2], the VoIP + chat program Skype stored a copy of its message history in several binary files collected under a directory named "chatsync". These are particularly useful, especially in comparison to the main Skype log/history database, because they purportedly contain messages that had been "deleted" by the client. Under the "chatsync" directory, the individual files, which have the extension .dat and a main name consisting of 8 bytes represented in hexadecimal (to make 16 ASCII characters), are placed into directories named after the first two characters (i.e. the first byte, as represented in hexadecimal) of their name.[3]

Identification

.dat files appear to have the magic number 73 43 64 72 07, as represented in hexadecimal.[4]

Links

References

  1. Wikipedia:Skype
  2. Message at top of http://fouryears.eu/2015/01/22/skype-removed-messages/
  3. 3.0 3.1 A Skype database, last modified late 2014, from an installation by User:Effect2
  4. https://www.hackerfactor.com/blog/index.php?/archives/231-Skype-Logs.html#c1066
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