A Method for Real-time Program Decryption Using a Separate Process Which Interacts with the Execution Process

摘要

A real-time program decoding method using a separate process interacting with an execution process is provided to decode only a part which is currently being executed when an encrypted program is executed. A decoding process(1) restores a previously performed decoding block to an encoding block and then decodes an encoding block which will be executed next. The decoding process controls an execution process(2) by overlapping a decoding request command. The execution process performs a command of the decoded block and requests the decoding process to decode the encoding block which will be executed next.