Pseudorandom-Function Property of the Step-Reduced Compression Functions of SHA-256 and SHA-512.
Hidenori KuwakadoShoichi HirosePublished in: WISA (2008)
Keyphrases
- pseudorandom
- hash functions
- uniformly distributed
- target function
- compression ratio
- random number
- post processing
- data compression
- random numbers
- aggregation functions
- stream cipher
- image compression
- basis functions
- secret key
- filled function method
- real valued functions
- continuous functions
- data sets
- image processing
- nonlinear functions
- similarity measure