Encryption process employing modified chaotic maps and relative digital signature process

摘要

An encryption process comprises the following steps:preliminarily choosing at least a secret key and a set of permutable functions defined on a certain phase space for encrypting/decrypting messages,choosing a code for encoding messages to be sent in the form of a number belonging to the phase space, and wherein the set of permutable functions is composed of modified chaotic maps generated by a composite function, the image of which is calculated modulo a certain pre-established integer number, obtained composing a first function, a second function and the inverse of said first function,the secret key is defined by using the second function.;This process uses a particular type of chaotic maps, the "modified chaotic maps", that work only on integer numbers. Given that operations on integers are faster than operations in floating-point arithmetic, this encryption process is faster than other processes that use chaotic maps.