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A METHOD FOR SOFTWARE ANTI-ROLLBACK RECOVERY
A METHOD FOR SOFTWARE ANTI-ROLLBACK RECOVERY
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机译:一种软件防回滚恢复方法
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摘要
A temporary anti-rollback table - which is cryptographically signed, unique to a specific device, and includes a version number - is provided to an electronic device requiring a replacement anti-rollback table. The table is verified by the device, and loaded to memory following a reboot. The memory image of the table is used to perform anti-rollback verification of all trusted software components as they are loaded. After booting, the memory image of the table is written in a secure manner to non-volatile memory as a replacement anti-rollback table, and the temporary anti-rollback table is deleted. The minimum required table version number in OTP memory is incremented. The temporary anti-rollback table is created and signed using a private key at authorized service centers; a corresponding public key in the electronic device verifies its authenticity.
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