| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a processor where real time processing performance is improved. SOLUTION: The processor has a function for reading an instruction key ciphered by a public key with respect to a secret key peculiar to the processor from an outer memory, a decoding function by the secret key of the key which is read, a key registering function to a table holding the instruction key corresponding to a program identifier, the notice function of the completion of registration to an instruction performing part, the holding function of the identifier of a program during performance, a function decoding the content of the prescribed address of the outer memory by the key stored in the table instructed by a fifth function, the performing function of an instruction decoded by the function and an instruction from the outer memory and a function performing a processing for decoding the instruction key by the decoding function, registering the program identifier designated by the instruction and the instruction key by making them correspond each other and informing the instruction performing part of the completion of registration and a processing for setting the program identifier designated by the instruction in the holding function and moving program performing control to the address of the outer memory, which is designated by the instruction.</p> |
