A Logical Encryption Method for Integrated Circuit Function Output Protection

An output protection, integrated circuit technology, applied in the field of logic encryption of integrated circuit function output protection, can solve the problems of many iterations, long time, long encryption time, etc., to achieve the effect of improving the degree of confusion and reducing the number of encryption iterations
CN113312677BActive Publication Date: 2021-12-21HANGZHOU INNOVATION RES INST OF BEIJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU INNOVATION RES INST OF BEIJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2021-12-21

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Abstract

The invention proposes a logic encryption method for integrated circuit function output protection, which belongs to the field of hardware security. It is mainly divided into two steps, one is to obtain the output sensitivity of each AND, OR, and non-logic unit in the circuit; the second is to sort the output sensitivity of each logic unit, as a priority index of the encryption cycle, according to the priority from high to high Exactly performs logical encryption processing. The present invention focuses on the position of the logical unit node that has the greatest impact on the output Hamming distance, so that the subsequent encryption algorithm reduces the number of key gate insertions to reduce hardware overhead, and proceeds on the basis of a certain priority. Encryption loop, which can reduce the number of encryption iterations.
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Description

technical field

[0001] The invention belongs to the field of hardware security, and relates to a logic encryption method for protection of integrated circuit function output. Background technique

[0002] All stages of the modern integrated circuit supply chain may be subject to security threats. There are hardware security vulnerabilities in every link of design, manufacturing, testing, deployment, and application. Attackers can use these vulnerabilities to insert hardware Trojans to cause irreversible damage to integrated circuits. .

[0003] In the functional design and physical design stages of the integrated circuit, the logic encryption technology implants a built-in locking mechanism in the original design of the integrated circuit, so that the circuit will only perform the correct operation when the correct key is entered, and the correct key will be obtained. output, which can effectively prevent attackers from implanting hardware Trojan horses in the circuit or re...

Claims

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