Cryptoanalysis is the study of methods used to obtain plaintext information from encrypted information without using the intended method such as using a key to decrypt the information. Cryptoanalysis attempts to attack weaknesses in the methods used to encrypt code or the methods used to generate keys.
|“||the analysis of a cryptographic system or its inputs and outputs to derive confidential variables or sensitive data, including clear text.||”|
- U.S. Export Administration Regulations, Part 772 (15 C.F.R. §772.1).