Hardware filling method for Hash algorithm SHA256 message preprocessing

Abstract

The invention discloses a hardware filling method for Hash algorithm SHA256 message preprocessing, which is characterized in that two state machines are used for respectively calculating message length and filling messages and can be divided into different states according to different outputs, at the moment, filled data can be transmitted by only one 32-bit register, and the area of a chip is reduced. Meanwhile, on a framework, the processing of the filling module becomes easy, and the period required for inputting one message block is equal to the period for processing one message block, sothat the processing speed of the chip is synchronous with that of an interface, a signal for handshaking with a filling part is reduced, and a gated clock unit is additionally arranged in front of thefilling part. According to the running state, an operation clock is turned off during data filling, and the filled clock is turned off during operation processing. Through the low-power-consumption design, power consumption of the algorithm can be greatly reduced during hardware operation.

Description

Technical field [0001] The present invention relates to the field of hardware filling, and more specifically, to a hardware filling method of hash algorithm SHA256 message preprocessing. Background technique [0002] In the era of big data, the development of social informatization and networking has led to an explosive growth of data. The amount of global data doubles approximately every two years. This means that the amount of data generated by humans in the last two years is equivalent to the entire amount of data generated before. Big data technology has quietly penetrated into various industries and has gradually become a production factor playing an important role. However, as big data technology has increased productivity and changed lifestyles, the ensuing security challenges cannot be ignored. At present, most of the solutions for information security are focused on the software level, and there are also information security solutions based on the hardware level, but th...

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Problems solved by technology

[0005] The check algorithms we are more familiar with include parity check and CRC check. These two checks have no ability to resist data tampering. They can detect and correct channel errors in data transmission to a certain extent, but they cannot prevent data from being tampered with. Malicious destruction of data

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