Register Write Protection Using Verification Tables Against Fault Injection

The patent applies preliminary action by checking whether data should be written to a register before actually performing the write operation. The verification table stores expected register values and addresses, and the system verifies against this table prior to writing, preventing fault injection attacks that would otherwise occur during the writing process.

The patent implements feedback by continuously monitoring and verifying data write operations against a pre-stored verification table. The system checks whether the data to be written matches the expected values in the verification table, providing real-time validation that prevents unauthorized or erroneous writes while maintaining operational capability.

The patent applies copying by creating a verification table that contains copies of expected register addresses and values. This verification table serves as a reference model against which actual write operations are compared. The copying approach provides simple verification logic without requiring complex cryptographic protocols or additional hardware security modules.

The patent implements universality by designing a verification mechanism that can protect data writing operations across multiple registers and different instruction types using a single unified verification table structure. The same verification logic applies whether protecting configuration registers, control registers, or data registers, reducing overall system complexity through standardized protection.