公开(公告)号：US20250111053A1

公开(公告)日：2025-04-03

申请号：US18721474

申请日：2022-11-21

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Inventor： Ali SAJJAD ,  Syed ZIA ,  Jamshed MEMON ,  Mamun ABU-TAIR

IPC: G06F21/57 ,  H04L9/32

Abstract: Attestation method for verifying the integrity of an attester device by an attestation proxy (AP): sending a trusted platform module (TPM) quote request message directly to a virtual TPM (vTPM) uniquely associated with the attester device, to prompt the vTPM to: produce a set of platform configuration register (PCR) values based on measurements requested and received by the vTPM directly from the attester device, then send a TPM quote comprising the set of PCR values directly to the AP; the attestation method further comprising the AP: receiving the TPM quote; sending the TPM quote to a remote relying party (RP) to prompt the RP to: verify the TPM quote is as expected, then return a remote attestation indicator to the AP; receiving the remote attestation indicator; and producing an attestation result based on the remote attestation indicator, wherein the attestation result is negative when the remote attestation indicator is negative.

公开(公告)号：US20250061236A1

公开(公告)日：2025-02-20

申请号：US18723142

申请日：2022-11-21

Applicant: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Inventor： Ali SAJJAD ,  Syed ZIA ,  Jamshed MEMON ,  Mamun ABU-TAIR

IPC: G06F21/64

Abstract: A method comprising an attestation proxy (AP): sending a trusted platform module (TPM) quote request message directly to a virtual TPM (vTPM) uniquely associated with an attester device, to prompt the vTPM to: produce a set of platform configuration register (PCR) values based on measurements requested and received by the vTPM directly from the attester device, then send a TPM quote comprising the set of PCR values directly to the AP; the attestation method further comprising the AP: receiving the TPM quote; retrieving, from a local copy of a distributed ledger (DL), a latest set of PCR values recorded for the attester device; comparing that set of PCR values retrieved from the local copy of the DL with the set of PCR values received in the TPM quote to generate a local attestation indicator; and producing an attestation result based on the local attestation indicator.