XNOR-XOR double-rail pre-charge logic unit

Abstract

The invention relates to an XNOR-XOR double-rail pre-charge logic unit and belongs to the field of circuit electronics. The XNOR-XOR double-rail pre-charge logic unit comprises a single-rail XOR logic circuit and a single-rail XNOR logic circuit complementing the single-rail XOR logic circuit. The two circuits are each provided with four input ends respectively connected with four input signals a, a<->, b and b<->; the output signal y of the single-rail XOR logic circuit is an XOR logic result of the input signals a and b; and the output signal y<-> of the single-rail XNOR logic circuit is an XNOR logic result of the input signals a and b. According to the invention, under the condition of not large area expenditure, power consumption of nodes inside a logic unit can be effectively balanced, the memory effect of the internal nodes is eliminated, the problem of early spreading effect of the XNOR-XOR double-rail pre-charge logic unit is effectively solved, and safe and effective XNOR-XOR logic is realized.

Description

technical field [0001] The invention relates to a logic unit structure, which is used to resist the differential power consumption analysis attack of a cryptographic chip, and belongs to the field of circuit electronics. Background technique [0002] Cryptography devices such as smart cards are widely used in various industry sectors such as telecommunications, finance, enterprise security and government, and the importance of security cannot be overstated. Although the embedded features of the cryptographic device make it impossible for attackers to directly access the key information in the cryptographic chip, the cryptographic chip will leak certain side channel information such as power consumption and electromagnetic radiation when it is working. Differential Power Analysis (DPA) ) attack technology uses the correlation between the key data and these information, and can analyze and obtain the value of the key through mathematical statistics and other methods. Due to t...

AI Technical Summary

Problems solved by technology

DRP logic is the most important branch of circuit-level protection. However, the early propagation effect has caused a serious security threat to DRP logic. Although the solution to eliminate the early propagation effect by adding a synchronization unit is effective, it also brings extremely serious problems. Large area overhead, therefore, how to effectively solve the early propagation effect is still a topic of great concern to researchers

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