Flash Memory : Brief Overview On Flash
Security is at the forefront of many applications, and
several Flash products are now equipped with two 64-bit
OTP (one-time pad) protection registers. These one-time
programmable registers can be used to increase system security.
Intel factories program a unique, unchangeable 64-bit number
into the OTP, and the customer as desired can program other
64-bit register. Once programmed, the customer segment can
be locked to prevent further reprogramming. The OTP information
can be used for manufacturing tractability and/or a small-encrypted
security key for system authentication.