Patent ID: 11962693
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 8:
9. A non-transitory computer-readable medium including contents that are configured to cause a computing system to carry out a method for generating a security key for an integrated circuit device, the method comprising:
generating a plurality of key bits with a random number generator comprising a SRAM;
storing the plurality of key bits in a nonvolatile memory comprising a one time programmable (OTP) device; and
generating the security key from the plurality of key bits stored in the nonvolatile memory,
wherein the SRAM stores fewer bits than the OTP device, and the SRAM is initialized two or more times to provide the plurality of key bits to the OTP device.