Circuit supporting multiple Hash algorithms

Abstract

The invention provides a circuit supporting multiple Hash algorithms. The circuit comprises an initialization logic, a constant selection logic, a message processing logic, an iteration logic, an MUXand a Hash value register array. The Hash algorithms supported by the design include MD5, SHA0, SHA1, SHA224, SHA256, SHA384, SHA512, and SM3. Continuous processing of one message is supported, only an iteration initial value defined by the corresponding Hash algorithm needs to be loaded into the Hash value register array before the first block of the message starts to be iterated, and then the message is processed continuously. In addition, the design also supports the segment processing of one message, the processing of another message can be inserted between two segments of one message, inthe mode, only an iteration result of the previous segment of the message needs to be loaded into the Hash value register array through the initialization logic before the iteration is started.

Description

technical field [0001] The invention belongs to the technical field of information security and cryptography, in particular to a circuit realization and design method supporting multiple Hash algorithms. Background technique [0002] Hash algorithm, also known as hash algorithm, hash algorithm, is a method of generating small numbers by operating on any file. Like fingerprints, Hash algorithm is a sign that guarantees the uniqueness of files with short information. A good Hash algorithm has the following characteristics: [0003] 1) Forward fast. Given the plaintext and the hash algorithm, the hash value can be calculated in limited time and limited resources. [0004] 2) Reverse difficulty. Given the hash value, it is difficult to inversely deduce the plaintext in finite time. [0005] 3) Input sensitive. Small changes to the original input information can make a big difference in the generated hash value. [0006] 4) Conflict avoidance. It is difficult to find two ...

AI Technical Summary

Problems solved by technology

[0004] 2) Reverse Difficulty

Even if hackers steal the Hash value stored in the system, they still cannot obtain the password and cannot log in to the system

[0011] In the prior art, the hardware implementation scheme of the Hash algorithm can only implement one Hash algorithm, and multiple Hash algorithms need to be implemented through multiple hardware solutions, which has poor versatility and high cost

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