SECURE BOOT METHOD AND SEMICONDUCTOR MEMORY SYSTEM FOR USING THE METHOD

摘要

A security booting method OTP(One-time Programmable memory) and a semiconductor memory system using the method are provided to reduce the capacity and write time of the OTP memory. An external memory(150) includes a kernel, a public key, and a first booting information authenticating public key and produces the test secret key for verifying a SBL(Second Boot Loader). An internal memory(120) verifies the integrity of the secondary boot loader. A FBL(First Boot Loader) produces the test secret key. The OTP memory(130) includes the second booting information which is generated by using the public key and secret key. The primary boot loader uses the first booting information of the external memory and the second booting information of the OTP memory.