Power-aware power balancing S box unit circuit and application method thereof

Abstract

The invention discloses a power-aware power balancing S box unit circuit and an application method thereof, belonging to the technical field of power attack resistance. The power-aware power balancing S box unit circuit comprises an S box arithmetic logic module, a power-aware compensation logic module, a cycling shifter and a backcycling shifter, wherein the S box arithmetic logic module and the power-aware compensation logic module are simultaneously driven by an operand input port, and the S box arithmetic logic module calculates output values at a result output port and output values at a negative flag bit output port in accordance with input data; and the power-aware compensation logic module calculates output values at a compensation signal output port in accordance with the input data. The invention reduces the power consumption of power balancing, and provides the implementation of equivalent load balancing of multiple data lines in a random exchange interconnection line manner for the load balancing problem of the multiple data lines.

Description

technical field [0001] The invention belongs to the technical field of power consumption attack resistance, and in particular relates to a power consumption-balanced S-box unit circuit and an application method thereof. Background technique [0002] Power consumption analysis attack is an effective side-channel attack method for cryptographic algorithm chips, especially smart IC cards. It poses a threat to important fields such as finance and security. Its main working principle is: The power consumption is related to the value of the intermediate result of the operation, which is mainly reflected in approximately proportional to the Hamming distance before and after the change of the intermediate result data. In general, it is difficult to determine the value before the data change, so in the actual attack, the Hamming weight of the intermediate result is often used as the characteristic variable of the data (approximately thinking that the Hamming weight of the data is pro...

AI Technical Summary

Problems solved by technology

Such a large power consumption overhead prevents power balancing techniques from being used in low-power applications, such as contactless smart cards

Other power consumption attack defense measures (using random numbers (masks) to protect intermediate results, randomly inserting delays, etc.) also have redundant computing operations and clock cycles, and ultimately make the power consumption level much higher than ordinary designs

[0005] In addition, the use of power balance technology needs to meet the load of each balanced data line. This requirement requires a high degree of matching between the two signal lines of dual-track encoded data. If more data lines need to be satisfied loads are the same, it is impossible to achieve in actual engineering

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