Multiple trusted computing environments with verifiable environment identities

摘要

A host computing platform 20 provides one or more computing environments 24 and includes a trusted device 213 arranged to form an integrity metric individual to each computing environment 24. The integrity metric is provided to a user 10 in response to an integrity challenge, signed for authentication using a signature key 213 held by the trusted device. In one embodiment the trusted device 213 selects a signature key unique to the computing environment 24, or in a second embodiment the trusted device forms the signed integrity metric including an identity label, in each case such that the user 10 can verify that the signed integrity metric corresponds to the expected computing environment 24.