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This paper analyzes the shortcomings of traditional security chip power-down protection mechanism, and puts forward a new CRC-based power-down protection mechanism of security chip. The security chip can use its own CRC algorithm to calculate the CRC check value, thus completing the power-down protection mechanism algorithm validation. The proposed power-down protection mechanism in the write-protected data, can reduce the operating data area 2 times. In the restoration of protection data, erase data area can be reduced 1 times. This mechanism can reduce the number of erase and write data area, can effectively extend the life of security chip.

A Novel Power-down Protection Mechanism for Secure Chip Based on CRC Check