METHOD AND DEVICE FOR REMOTE ATTESTATION OF COMBINED DEVICE

Embodiments of this application disclose a remote attestation method for a composite device and a related device. The composite device includes a first unit and a second unit. The method includes: A first unit obtains first measurement information of a second unit; the first unit performs trustworthiness attestation on the second unit based on the first measurement information, to obtain a first attestation result; and the first unit sends the first attestation result to a remote attestation device. In this way, the first unit in the composite device has a remote attestation function, and may perform trustworthiness attestation on another unit in the composite device to which the first unit belongs, so that not only system trustworthiness of the composite device is appraised, thereby improving reliability of an entire system, but also an amount of data that needs to be exchanged between the remote attestation device and the composite device in a remote attestation process can be effectively reduced, thereby improving remote attestation efficiency for the composite device to some extent.