A secure integrated circuit chip and a protection method thereof

A secure integrated circuit chip and a protection method thereof are provided. A secure chip apparatus includes a memory to store an encrypted value E and a one-way function output-value H, which is an output value of a one-way function computed with a nonce N as input; an interface to transfer data with an external device; and chip security circuitry to lock a portion of the chip apparatus from use, receive an unlock request from an unlocking hardware security module (HSM) via the interface, provide the encrypted value E to the HSM responsively to the unlock request, receive a value N' from the HSM, the value N' being a decrypted value of the encrypted value E, compute a one-way function output-value H' responsively to the value N', compare the value H' to the value H, and unlock the portion of the chip apparatus for use responsively to a match between the value H' and the value H. 本发明提供一种安全集成电路芯片及其保护方法，安全芯片装置包括存储器，用来储存加密值E和单向函数输出值H，上述单向函数输出值H是以随机数N输入单向函数进行计算所得的输出值：接口，用于与外部装置传输数据；以及芯片安全电路，用于锁定芯片装置的一部分以防止使用，通