Homework in C# from the Stanford "massive open online course" crypto-class.org which I did not finish -- extremely cool but extremely outside my field of professional interest.
BirthdayAttack.csApparently a birthday attack (finding two messages whose hashes collide). At the time I didn't deign to write any comment in this code. Apparently the program throws on success and returns silently on failure? Nice.ManyTimesPad.csAn attack on an one-time pad that has been improperly used many times for different messages (many times pad) creating the vulnerability we exploit. The program isn't fully automatic: a first part outputs some partially decrypted (probably, relying on bytes having ASCII meaning) which a human has inspected (I have) to guess the plain text message, with which the rest of the program obtains the key and decrypts all messages encrypted with the same one.WeakPRG.csApparently an attack on a weak pseudo-random generator, guessing the next number to be generated. Again I wrote no comments into this short code (with short course deadlines).utils/Hex.csJust two functions to transcode (encrypted) messages between byte arrays and string representations in hexadecimal -- as they were provided in the course. Some of the programs above depend on this.