Abstract: Provided are computing systems that feature a centralized attestation device able to perform attestation on behalf of a number of different platform components. More particularly, the present disclosure provides extensible mechanisms for representing trustworthiness statements by an attester device within a platform either as implicit attestation or explicit attestation. Thus, according to one aspect of the present disclosure, a computing system can include an attester device that implements a hybrid model for presenting evidence of measurements of all the components in a platform to a verifier.

Abstract: The present disclosure provides systems and methods for demonstrating the identity of a central processing unit (CPU) to a Trusted Platform Module (TPM) with improved security against, for example, interposers on a communications bus. In particular, according to an aspect of the present disclosure, a CPU can generate a policy alias key that can be used to sign a challenge to prove the identity of the CPU to the TPM. Specifically, the policy alias key can be generated by the CPU by performing a key derivation function on a combined identity value generated by the CPU for the CPU and TPM. The combined identity value can be generated by the CPU from a CPU device identity value and a public endorsement key (EK) associated with the TPM.

Abstract: Provided are computing systems that feature a centralized attestation device able to perform attestation on behalf of a number of different platform components. More particularly, the present disclosure provides extensible mechanisms for representing trustworthiness statements by an attester device within a platform either as implicit attestation or explicit attestation. Thus, according to one aspect of the present disclosure, a computing system can include an attester device that implements a hybrid model for presenting evidence of measurements of all the components in a platform to a verifier.

Abstract: The present disclosure provides systems and methods for demonstrating the identity of a central processing unit (CPU) to a Trusted Platform Module (TPM) with improved security against, for example, interposers on a communications bus. In particular, according to an aspect of the present disclosure, a CPU can generate a policy alias key that can be used to sign a challenge to prove the identity of the CPU to the TPM. Specifically, the policy alias key can be generated by the CPU by performing a key derivation function on a combined identity value generated by the CPU for the CPU and TPM. The combined identity value can be generated by the CPU from a CPU device identity value and a public endorsement key (EK) associated with the TPM.

Abstract: The present invention provides for streamlined issuance of certificates and other tokens that are contingent on key attestation of keys from a trusted platform module within a computing platform. Various methods are described for wrapping the requested token in a secret, such as an AES key, that is encrypted to a TPM based key in a key challenge. If the requesting platform fails the key challenge, the encrypted certificate or token cannot be decrypted. If requesting platform passes the challenge, the encrypted certificate or token can be decrypted using the AES key recovered from the key challenge.

Abstract: The present invention provides for streamlined issuance of certificates and other tokens that are contingent on key attestation of keys from a trusted platform module within a computing platform. Various methods are described for wrapping the requested token in a secret, such as an AES key, that is encrypted to a TPM based key in a key challenge. If the requesting platform fails the key challenge, the encrypted certificate or token cannot be decrypted. If requesting platform passes the challenge, the encrypted certificate or token can be decrypted using the AES key recovered from the key challenge.

Abstract: The present invention provides for streamlined issuance of certificates and other tokens that are contingent on key attestation of keys from a trusted platform module within a computing platform. Various methods are described for wrapping the requested token in a secret, such as an AES key, that is encrypted to a TPM based key in a key challenge. If the requesting platform fails the key challenge, the encrypted certificate or token cannot be decrypted. If requesting platform passes the challenge, the encrypted certificate or token can be decrypted using the AES key recovered from the key challenge.

Abstract: The present invention provides for streamlined issuance of certificates and other tokens that are contingent on key attestation of keys from a trusted platform module within a computing platform. Various methods are described for wrapping the requested token in a secret, such as an AES key, that is encrypted to a TPM based key in a key challenge. If the requesting platform fails the key challenge, the encrypted certificate or token cannot be decrypted. If requesting platform passes the challenge, the encrypted certificate or token can be decrypted using the AES key recovered from the key challenge.