The application has an implementation for the Liners & Differential crypto analysis of the symmetric encryption algorithm DES
Linear cryptanalysis is a general form of cryptanalysis based on finding affine approximations to the action of a cipher. Attacks have been developed for block ciphers and stream ciphers for more info check the wiki.
Differential cryptanalysis is a general form of cryptanalysis applicable primarily to block ciphers, but also to stream ciphers and cryptographic hash functions for more info check the wiki.