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Update bitlocker-overview.md

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Siddarth Mandalika 2020-10-06 10:51:14 +05:30 committed by GitHub
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windows/security/information-protection/bitlocker/bitlocker-overview.md
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@ -29,7 +29,7 @@ This topic provides a high-level overview of BitLocker, including a list of syst
BitLocker Drive Encryption is a data protection feature that integrates with the operating system and addresses the threats of data theft or exposure from lost, stolen, or inappropriately decommissioned computers.
BitLocker provides the maximum protection when used with a trusted platform module (TPM) version 1.2 or later versions. The TPM is a hardware component installed in many newer computers by the computer manufacturers. It works with BitLocker to help protect user data and to ensure that a computer has not been tampered with while the system was offline.
BitLocker provides the maximum protection when used with a Trusted Platform Module (TPM) version 1.2 or later versions. The TPM is a hardware component installed in many newer computers by the computer manufacturers. It works with BitLocker to help protect user data and to ensure that a computer has not been tampered with while the system was offline.
On computers that do not have a TPM version 1.2 or later versions, you can still use BitLocker to encrypt the Windows operating system drive. However, this implementation requires the user to insert a USB startup key to start the computer or resume from hibernation. Starting with Windows 8, you can use an operating system volume password to protect the operating system volume on a computer without TPM. Both options do not provide the pre-startup system integrity verification offered by BitLocker with a TPM.
@ -55,9 +55,9 @@ To find out what's new in BitLocker for Windows 10, such as support for the XTS
BitLocker has the following hardware requirements:
For BitLocker to use the system integrity check provided by a trusted platform module (TPM), the computer must have TPM 1.2 or later versions. If your computer does not have a TPM, enabling BitLocker makes it mandatory for you to save a startup key on a removable device, such as a USB flash drive.
For BitLocker to use the system integrity check provided by a TPM, the computer must have TPM 1.2 or later versions. If your computer does not have a TPM, enabling BitLocker makes it mandatory for you to save a startup key on a removable device, such as a USB flash drive.
A computer with a TPM must also have a trusted computing group (TCG)-compliant BIOS or UEFI firmware. The BIOS or UEFI firmware establishes a chain of trust for the pre-operating system startup, and it must include support for TCG-specified Static Root of Trust Measurement. A computer without a TPM does not require TCG-compliant firmware.
A computer with a TPM must also have a Trusted Computing Group (TCG)-compliant BIOS or UEFI firmware. The BIOS or UEFI firmware establishes a chain of trust for the pre-operating system startup, and it must include support for TCG-specified Static Root of Trust Measurement. A computer without a TPM does not require TCG-compliant firmware.
The system BIOS or UEFI firmware (for TPM and non-TPM computers) must support the USB mass storage device class, including reading small files on a USB flash drive in the pre-operating system environment.