Random key generator using human voice

Strength of cryptographic cipher depends on the statistical performance of its generated key stream. Generation of high quality key stream is a challenging task, which decides the level of security offered by the cipher. In this paper we propose a new method for generating random keys based on human voice or speech data which generates 256 bits key the features of randomness of speech signals are used for generating random keys. The statistical performance of the proposed generator is performed which ascertain that the generated random keys sequence has noise-like characteristics. In this paper, a novel scheme for key generation is presented which is based on 256-bit key. Most important feature of this scheme is we use unique values of the speech signal for generating random keys. Our random keys, passes 12 NIST (National Institute of Standards and Technology) randomness test, this algorithm is enough strong and random for random key generation.