Abstract Tangle is an iterative one-way hash function based on the Merkle-Damgard scheme strengthened by a message dependent round function. It was submitted to the NIST SHA-3 competition, being accepted for first round evaluation. We propose an alternative message expansion scheme for Tangle in order to thwart the collision attacks found during such evaluation. Based […]
Abstract This paper presents a 64-bits chaotic block cryptosystem, which uses as noise generator one-dimensional chaotic maps with 8 bits sub-blocks data. These chaotic maps use a control parameter that allows them to operate in the chaotic region, which guarantees that each sub-block of data is mixed with unpredictable random noise. Statistical mechanic tools such […]