Patent ID: 9588908
Date: 2017-03-07
CPC Classifications: G06F,G11C,H04L

Claim:
1. A secure element comprising: a first die; a first resistive random access memory (ReRAM) array configured as a content addressable memory (CAM) located on the first die, wherein the CAM comprises a first block of a plurality of ReRAM cells configured for storing a first reference pattern and a second block of a plurality of ReRAM cells configured for receiving a first input pattern; a second ReRAM array configured as a random access memory (RAM) located on the first die, wherein the RAM comprises a third block of a plurality of ReRAM cells configured for storing a second reference pattern, a compare circuit for comparing the first block of a plurality of ReRAM cells configured for storing the first reference pattern to the second block of a plurality of ReRAM cells configured for receiving the first input pattern, wherein the compare circuit comprises a plurality of comparators and is located outside of the first ReRAM array and the second ReRAM array; a first heater located on the first ReRAM array configured as a CAM, wherein the first heater is configured to heat the first ReRAM array and erase the first reference pattern; and wherein the first reference pattern comprises a reference authentication cryptographic key stored in the first block of a plurality of ReRAM cells in the CAM and the first input pattern comprises an input authentication cryptographic key provided during an authentication cycle.