REMOTE STATION AND METHOD FOR RE-ENABLING A DISABLED DEBUG CAPABILITY IN A SYSTEM-ON-A-CHIP DEVICE

摘要

A disabled debug capability may be securely re-enabled in an integrated circuit such as a system-on-a-chip (SoC) device. In a method, the integrated circuit receives a debug re-enable message. The debug re-enable message includes a debug re-enable token signed by a private key. The debug re-enable token is based on a serial number of the integrated circuit and a first copy of a symmetric key. The debug re-enable token is validated using a public key corresponding to the private key. A comparison token is generated using the serial number of the integrated circuit and using a second copy of the symmetric key stored in a one-time-programmable (OTP) memory of the integrated circuit. The integrated circuit compares the debug re-enable token and the comparison token. The disabled debug capability is re-enabled in the integrated circuit if the debug re-enable token matches the comparison token.

主权项

1. A method for re-enabling a disabled debug capability in an integrated circuit, comprising:
receiving, by the integrated circuit, a debug re-enable message, wherein:
the debug re-enable message includes a debug re-enable token signed by a private key, andthe debug re-enable token is based on a unique identifier of the integrated circuit and a first copy of a symmetric key; validating the debug re-enable token using a public key corresponding to the private key; generating a comparison token using the unique identifier and using a second copy of the symmetric key securely stored in the integrated circuit; comparing the debug re-enable token and the comparison token; and re-enabling the disabled debug capability in the integrated circuit if the debug re-enable token matches the comparison token.