What is Crypto++/Cryptopp ?
Crypto++ Library is a free C++ class library of cryptographic schemes.
aMule needed Crypto++/Cryptopp for Secure User Identification (SUI) from versions 2.0.0-rc1 to 2.0.0-rc5 (included). As of version 2.0.0-rc6, all necessary Crypto++ code is embedded in aMule's source to avoid conflicts with some distros. However for 2.2.0 Crypto++ was removed again from the aMule source tree.