Protection structure and method for electromagnetic attack protection of chip

Abstract

The invention proposes a protection structure and method for the electromagnetic attack protection of a chip, and the structure and method achieve the protection of the whole chip or a part of the chip against the electromagnetic fault injection attack under the condition that the performances of the chip are not affected. The method is low in cost, is reliable in performance, and is wide in application range. The method employs an on-chip inductor to surround a to-be-protected overall circuit or circuit part. When there is an electromagnetic injection attack, the on-chip inductor carries outthe sampling of an electromagnetic signal injected during an inductor fault, a sampled voltage or current signal is converted into an alarm signal for output through a detection module, thereby achieving a purpose of fault injection protection.

Description

technical field [0001] The invention relates to a protection method suitable for chip electromagnetic attack protection. When a chip is attacked by a strong electromagnetic field injection, it is likely to generate fault or error information that can be used by the attacker. With the reduction of the process size, the attack More and more effective, becoming a common method of fault attack. The invention proposes an electromagnetic attack protection method implemented inside the chip, which is simple, reliable, easy to implement, and low in cost; in addition, by adjusting the position and shape of the on-chip inductance, the whole chip protection and local area protection can be flexibly realized. Background technique [0002] In recent years, there have been more and more attack methods targeting security chips that provide cryptographic security services. These attack methods are commonly used in invasive, non-invasive and semi-invasive methods. Intrusive attack methods ...

AI Technical Summary

Problems solved by technology

[0003] Fault injection attacks cause errors in the internal state of the chip or internal cryptographic operations by injecting interference signals into the security chip at a specific moment

Images