Second-order side channel energy analysis method for SM4 algorithm of simple mask

An energy analysis and side channel technology, which is applied in the field of cryptographic algorithm analysis and detection, and can solve problems such as second-order energy analysis without a systematic analysis method.
CN103647637AActive Publication Date: 2014-03-19国家密码管理局商用密码检测中心
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
国家密码管理局商用密码检测中心
Publication Date
2014-03-19

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Abstract

The invention discloses a second-order side channel energy analysis method for an SM4 algorithm of a simple mask. To achieve mask protection for the SM4 algorithm with the output of four S boxes carrying the same mask value, the method comprises the steps of (1) acquiring energy traces and establishing a sampling energy consumption matrix; (2) preprocessing the energy consumption matrix in the previous step; (3) selecting attack points to conduct CPA or DPA to obtain rki, 0; (4) re-selecting an S-box operation part and following the steps (2) and (3) to obtain rki, u through analysis; and (5) carrying out the steps (2), (3) and (4) on previous / next four rounds to obtain a round key and obtaining an initial key through a key inverse expansion operation. The technical scheme of the invention innovatively provides the new second-order energy analysis method, develops a new situation of SM4 cryptographic algorithm attack, extends the side channel power analysis method for the SM4 algorithm, and can fully and effectively conducts side channel energy analysis on the SM4 cryptographic algorithm; and the method of the technical scheme is highly practical for common mask protection measures.
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Description

technical field

[0001] The invention belongs to the technical field of cryptographic algorithm analysis and detection, and specifically aims at realizing the second-order side channel energy analysis for the SM4 cryptographic algorithm with mask protection measures, and particularly relates to the secondary SM4 cryptographic algorithm with the same input and output middle mask of the S box. The first-order side channel energy analysis method. Background technique

[0002] With the development of information technology, various cryptographic algorithms are being widely used in economic, military, administrative and other important departments to protect the security of information. In view of the importance of cryptographic algorithms, the analysis and research of cryptographic algorithm software and hardware implementation (cryptographic modules) is of great significance to protect information security. In recent years, several attacks on cryptographic modules have become k...

Claims

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