In accordance with one aspect of attesting to a value of a register and/or
memory region, an operating system of a device receives a request, in
response to an ATTEST operation being invoked, to make a signed
attestation of a value. The operating system signs a statement that
includes the value using a private key of a pair of public and private
keys of a processor of the device. The value may be stored in a register
and/or a region of memory.