Demystifying the Secure Enclave Processor
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Memory Encryption Modes<br />
• Appears to support ECB, CBC, and XEX.<br />
• Capable of AES-128 or AES-256.<br />
• Supports two channels.<br />
▫ BootROM uses channel 1.<br />
All access to PA 0xC8_0000_0000 are encrypted<br />
and decrypted into PA 0x8_0000_0000 (external<br />
RAM).<br />
▫ SEPOS uses channel 0.<br />
All access to PA 0x88_0000_0000 are encrypted<br />
and decrypted into PA 0x8_0000_0000 (external<br />
RAM).