| 摘要 |
A computing environment maintains the confidentiality of data stored in system memory. The computing environment has an encryption circuit in communication with a CPU. The system memory is also in communication with the encryption circuit. An address bus having a plurality of address lines forms part of the system and a value of at least one of the address lines determines a key selected from a plurality of keys to use in the encryption circuit to encrypt data being transferred by the CPU to the memory.
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