Advanced encryption standard operational circuit and an encryption and decryption method thereof
An advanced encryption standard and operation circuit technology, applied in the advanced encryption standard operation circuit and its encryption and decryption fields, can solve the problems of inability to cut the AES round operation, unable to meet the processor frequency requirements, etc., to achieve the effect of improving the execution efficiency
Active Publication Date: 2019-05-28
合芯科技有限公司
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Problems solved by technology
[0004] In view of this, the embodiment of the present invention provides an Advanced Encryption Standard operation circuit and its encryption and decryption method to solve the problem that the operation in the AES wheel cannot be cut, and the frequency requirement of the processor cannot be met when the operation is performed in the processor.
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[0022] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...
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The invention discloses an advanced encryption standard operational circuit and an encryption and decryption method thereof. The operational circuit comprises an operational circuit and a control circuit, First stage circuit, Second stage circuit, Third stage circuit, Calculation circuit and control circuit, the control circuit provides a selection signal to control the first-stage circuit according to the encrypted and decrypted working mode; an operation flow in the second-stage circuit and the third-stage circuit; According to the advanced encryption standard operation circuit provided by the embodiment of the invention, the encryption and decryption process of each round of the AES algorithm is divided into a plurality of pipeline stages for operation, and each pipeline stage in the AES algorithm is controlled by the selection signal instruction provided by the control circuit to carry out corresponding combination calculation to complete all the encryption and decryption processesof the AES; In the process of completing AES encryption and decryption, each step of calculation in the AES encryption and decryption process can be initiated, terminated and checked at any time; Inthe process of executing the data AES encryption and decryption, the processor instruction with high priority can be preferentially executed, the flash encryption and decryption instruction does not need to be dropped, and the execution efficiency of the processor can be well improved.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to an advanced encryption standard operation circuit and an encryption and decryption method thereof. Background technique [0002] With the advancement of science and technology, the exchange of information has become more frequent in people's lives, and ensuring the safe transmission of information has become a vital part of communication. The National Institute of Standards and Technology (NIST) formulated and announced the Advanced Encryption Standard (English: Advanced Encryption Standard, abbreviation: AES) algorithm in 2001, which replaced the DES encryption algorithm and became one of the most popular encryption methods today. The AES encryption algorithm has the characteristics of high security, simple process, and compact encoding, which can meet the needs of information encryption in most cases. [0003] AES is an encryption algorithm for symmetric key blocks. To ...
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IPC IPC(8): H04L9/06
Inventor 刘刚冯春阳彭琅张兴革王俊杰黄晶
Owner 合芯科技有限公司