I collected a number of obfuscated programs and analyzed them.
I de-obfuscated code and add comments to non-trivial
You can download all these files by one package:
How to unpack:
$ gunzip obf.tar.gz
$ tar xf obf.tar
X:> pkunzip -d obf.zip
Originally this document was a report for the course "Languages and systems of programming" (Part I, summer of 1997). Lector is Igor O. Odintsov.
Paper is based on "The Thirteenth International Obfuscated C Code Contest" (13th IOCCC, 1996). IOCCC official homepage is http://www.ioccc.org.
I'm too lazy to translate all to english. But I was too lazy to convert all to russian when I was building this pages. So a lot of materials are in english. All links to russian from the navigation panel are disabled.