DeCSS2 -- Another download link
DeCSS1 -- Source-code for the DeCSS decryptor
GRC -- Well-written and well-informed articles on security.
RussianCrackers -- Tools to descrypt various documents
SecurityFocus -- Security magazine for the suits-and-meetings crowd
Elcomsoft -- Support the employers of Skylarov! This is the place to go if you want tools to decrypt any type of file (MS-Money, MS-Word, Access, WinZip, eBook...)
AppliedCrypto -- Bruce Schneider's famous book on cryptography (Amazon book link)
You have already downloaded the DeCSS DVD-decryption program -- view the source-code of this page for details!