SoftME: A Software-Based Memory Protection Approach for TEE System to Resist Physical Attacks

Table 2

Encryption process in the switching phase.

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Initialization: derive a key from the device key:

= HKDF (, taskID).

Read plaintext from the OCM.

 1. (C, T) = AE (, P, IV).

 2. IV = IV + 1.

 3. Store to DRAM.

 4. Store , and IV to OCM.

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