Method for generating message summary

Abstract

The invention discloses a process for generating message, which belongs to cipher key algorithm field. The process includes: processing covering position, covering length to original message, then dividing new message into multiple message blocks and disposing in sequence, and initializing intermediate quantity buffer zone, calculating current intermediate quantity based on initialization intermediate quantity buffer zone and calculating word change in terms of current intermediate quantity, after disposing every message blocks, current word change is as message summarization. the invention processes calculate again in using intermediate quantity, calculating required intermediate quantity buffer zone only need sixteen word intermediate quantity buffer zone, saving RAM resource, and avoiding these digital data occupation one RAM resource, depressing equipment demand, improving equipment applied competitive power by required message covering position and covering length digital data oftemporarily buffer memory calculating in the sixteen word intermediate quantity buffer zone.

Description

technical field [0001] The invention relates to the field of key algorithms, in particular to a method for generating message summaries. Background technique [0002] In the existing information encryption technology, common information protection methods can be roughly divided into two categories: confidentiality and authentication. The current authentication technology has two methods: user authentication and message authentication. User authentication is used to identify whether the user is a legitimate user; message authentication is to verify that the received message is indeed from the real sender and has not been authenticated. Modified messages can also be verified for order and timeliness of messages. Message authentication actually generates redundant information for the message itself - MAC (Message Authentication Code, message authentication code). The message authentication code uses a key to generate a new data block for the message to be authenticated, and en...

AI Technical Summary

Problems solved by technology

[0054] The characteristic of the standard SHA1 algorithm is that it requires 80 buffers with a capacity of 32-bit words, and also needs to allocate buffers for the complement length of the message, which causes a waste of RAM resources, and the continuous cost reduction of key generation equipment is The trend of the product is that since the RAM area in the key generation device is usually small (within 256 bytes), it will not be possible to have enough RAM resources to satisfy the SHA1 algorithm operation

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