Information theoretic concepts apply to cryptography and cryptanalysis. Evidence of security against linear cryptanalysis is usually expected of new cipher designs. These enhancements are designed to protect against, for example, chosen-plaintext attack cryptanalysis. It is responsible for cryptanalysis and encryption of sensitive data. As a result, power analysis attacks combine elements of algorithmic cryptanalysis and implementation security. Turing became a general consultant for cryptanalysis at Bletchley Park. In addition, the theoretical and practical aspects of "cryptanalysis", or "codebreaking", was much advanced. Such doubling of characters was very helpful for the statistical cryptanalysis used at Bletchley Park. This attack, and all subsequent attacks are based on truncated differential cryptanalysis. An overview of hash function security/cryptanalysis can be found at hash function security summary. However, the principle of concentrating high-grade cryptanalysis at Bletchley was maintained. It is based on differential cryptanalysis. However, an LFSR is a linear system, leading to fairly easy cryptanalysis. There are two parts to linear cryptanalysis. However, any postmortems for cryptanalysis may be premature.