The invention discloses an instruction tamper-proofing device for a traffic information board
system, relates to the field of traffic
information security, and solves the three technical problems of key clone risk, high computing power dependence and poor environmental adaptability of a traditional
encryption scheme. A tamper-proof
system is constructed through a triple cooperation mechanism: a unique unclonable physical feature is extracted based on a physical unclonable circuit, efficient integrity
verification is realized through a segmented
cascade parity check circuit, and a
timestamp is accurately compared in combination with a temperature compensation
clock; and multi-dimensional features are fused, spliced and integrated, tampering recognition is performed through feature comparison, and ultimate protection is formed if irreversible hardware is triggered to fail if tampering recognition is performed. The device achieves pure hardware
millisecond-level response, thoroughly eliminates
software dependence, maintains zero misjudgment rate in an
extreme environment, ensures full-life-cycle safety of instructions through physical-level protection, and provides unduplicated safety guarantee for an information board
system.