A Bit-level Block Cipher diffusion analysis test-BLDAT

Abstract

The paper describes a scheme aimed at measuring the diffusion characteristic of a block cipher. Cryptographic strength of a cipher is directly proportional to the extent to which diffusion is achieved by the underlying cipher. The scheme used to measure this characteristic of a cipher and the test results are analyzed to come to conclusion. Potentially, the scheme described in the paper can be added as part of the already existing, varied test suit to act as a distinguisher based on the diffusion characteristic of the underlying cipher.