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A hybrid decoding method of soft and hard for sram PUF

A decoding method and soft-hard mixing technology, applied in the field of channel coding and decoding, can solve the problems of weak error correction performance and large energy consumption, and achieve the effects of less energy consumption, reduced resource consumption and high efficiency

Active Publication Date: 2021-03-19
58TH RES INST OF CETC
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Problems solved by technology

[0004] The purpose of the present invention is to provide a soft and hard hybrid decoding method suitable for SRAM PUF to solve the problems of weak error correction performance and large energy consumption of existing decoding methods

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  • A hybrid decoding method of soft and hard for sram PUF
  • A hybrid decoding method of soft and hard for sram PUF

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Embodiment 1

[0021] The present invention provides a soft and hard hybrid decoding method suitable for SRAM PUF, the flow chart is as follows figure 1 shown. The described soft-hard hybrid decoding method suitable for SRAM PUF comprises the steps:

[0022] Step S11, hard decoding the received SRAM PUF response message;

[0023] Step S12, judging the decoding result, if the decoding is successful, then output the codeword; otherwise, proceed to step S13;

[0024] Step S13 , soft decoding the SRAM PUF response message, and judging the decoding result, if the decoding is successful, then output the code word; if the decoding fails, then end.

[0025] Specifically, firstly, the received SRAM PUF response message polluted by noise is hard-decoded. Wherein, the hard decoding is a decoding algorithm using a hard message and is based on the RS code; the hard message indicates a received codeword number.

[0026] Judging the decoding result, if the decoding is successful, output the codeword; i...

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Abstract

The invention provides a soft-hard hybrid decoding method suitable for SRAM PUF, belonging to the technical field of channel encoding and decoding. The method includes the steps of hard-decoding a received SRAM PUF response message; judging the decoding result, and if the decoding is successful, outputting the codeword, otherwise, soft decoding the SRAM PUF response message, judging the decoding result, and outputting a codeword if the decoding is successful; ending the process if decoding fails. Aiming at different contaminated codewords, the method enables a hardware structure to be effectively reused by dynamically choosing the hard and soft decoding algorithm, which reduces the resource consumption and the energy consumption of a decoding module and improves the efficiency.

Description

technical field [0001] The invention relates to the technical field of channel coding and decoding, in particular to a soft-hard decoding method suitable for SRAM PUF. Background technique [0002] SRAM PUFs are a way to implement physically unclonable functions using fabrication variations in the steady-state of the memory cell structure. During its power-on process, environmental factors such as external temperature and noise will cause the readout value of the SRAM to be different at different times. In order to overcome this, the FEC forward error correction code must be introduced in the practical application of SRAM PUF to increase the reliability of received data. At present, there are few similar studies, and they mainly focus on using only one decoding algorithm, such as BCH code, RM code decoding algorithm in hard decoding algorithm, or RS code, Turbo code, LDPC code decoding algorithm in soft decoding algorithm. Wait. Only using hard decoding algorithms often l...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/73H03M13/15
CPCG06F21/73H03M13/1515
Inventor 胡鹏周昱张荣魏敬和
Owner 58TH RES INST OF CETC
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