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The measurements of the ACM and BIOS code modules are extended to PCR0, which is said to hold the static core root of trust measurement (CRTM) as well as the measurement of the BIOS Trusted Computing Base (TCB). The BIOS measures additional components into PCRs as follows: PCR0 – CRTM, BIOS code, and Host Platform Extensions [a]
The Microsoft products Windows Vista, Windows 7, Windows 8 and Windows RT make use of a Trusted Platform Module to facilitate BitLocker Drive Encryption. [22] Other known applications with runtime encryption and the use of secure enclaves include the Signal messenger [23] and the e-prescription service ("E-Rezept") [24] by the German government.
January 10, 2023 This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. 10.0.19044.2545 [66] KB5019275 Release Preview Channel: January 12, 2023 10.0.19044.2546 [67] KB5022282 Release Preview Channel and public release:
Windows 10 was made available for download via MSDN and TechNet, as a free upgrade for retail copies of Windows 8 and Windows 8.1 users via the Microsoft Store, and to Windows 7 users via Windows Update.
Field upgrade is the TCG term for updating the TPM firmware. The update can be between TPM 1.2 and TPM 2.0, or between firmware versions. Some vendors limit the number of transitions between 1.2 and 2.0, and some restrict rollback to previous versions. [citation needed] Platform OEMs such as HP [87] supply an upgrade tool.
Windows includes the IExpress tool for the creation of INF-based installations. INF files form part of the Windows Setup API and of its successor, Windows Installer. The \windows\inf directory contains several such .inf files. [3] Precompiled setup Information file (*.pnf) is a binary representation of an INF file compiled by the operating system.
When used in conjunction with a compatible Trusted Platform Module (TPM), BitLocker can validate the integrity of boot and system files before decrypting a protected volume; an unsuccessful validation will prohibit access to a protected system. [6] [7] BitLocker was briefly called Secure Startup before Windows Vista's release to manufacturing. [6]
A PBA environment serves as an extension of the BIOS, UEFI or boot firmware and guarantees a secure, tamper-proof environment external to the operating system as a trusted authentication layer. [2] The PBA prevents any operating system from loading until the user has confirmed he/she has the correct password to unlock the computer. [ 2 ]