One-way hashing function construction method and system based on built-in chaos mapping

Abstract

The invention provides a method and a system for structuring expandable one-way hash function based on embedded chaotic mapping. The structuring method comprises the following steps of: receiving the scheduled chaotic mapping, an initial value, a cipherkey and a message to be treated so as to generate a group of initial buffer value chaotic sequence; using the chaotic sequence to bit-stuff the message so as to divide the stuffed message pad into subblocks with the same length; carrying out Boolean operation to the initial buffer value sequence group and one of the subblocks and taking the result as a new buffer value sequence group; carrying out the Boolean operation again to the new buffer value sequence group and another subblock from the subblocks with preset order until finishing the Boolean operation to all subblocks; cascading of final output, which is taken as the one-way hash function value sequence of the message. Therefore, the structuring method is simple and easy for operation, which effectively realizes the diffusing and mixing of the message and has obvious enhancement in the aspects of security, collision resistance and operation speed.

Description

Method and system for constructing one-way hash function based on embedded chaotic map technical field The invention relates to a method and a system for constructing a hash function. More specifically, the present invention relates to a method and system for constructing a scalable one-way hash function based on an embedded chaotic map. The scalable one-way hash function maps messages into one-way hash sequences for preventing all The above message has been falsified. Background technique With the rapid development of Internet technology, data exchange is becoming more and more frequent and active in e-commerce, and the integrity and authentication of sensitive data, electronic checks, electronic signatures, emails, etc. are particularly important. Message authentication is to provide a mechanism for verifying data integrity, which can confirm the source of data and judge whether it has been tampered with. What is commonly used is that the one-way hash function is simpl...

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