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The STM HardCache is a secure SOC used for Access Control and Data StorageEncryption. It integrates a dedicated RISC processor coupled with a HWaccelerated Cryptographic Engine that implements AES 128/192/256(ECB/CBC/CTR modes), SHA-1/256, HMAC-SHA-1/256, RSA PKCS#1 ver2.1 and ANSIx9.31 DRNG.