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The protocol exists in two versions, MS-CHAPv1 (defined in RFC 2433) and MS-CHAPv2 (defined in RFC 2759).MS-CHAPv2 was introduced with pptp3-fix that was included in Windows NT 4.0 SP4 and was added to Windows 98 in the "Windows 98 Dial-Up Networking Security Upgrade Release" [1] and Windows 95 in the "Dial Up Networking 1.3 Performance & Security Update for MS Windows 95" upgrade.
There are several generic techniques for stealing credentials on systems with Credential Guard: A keylogger running on the system will capture any typed passwords. [8] [3] A user with administrator privileges can install a new Security Support Provider (SSP).
In Windows Vista, GINA has been replaced by credential providers, which allow for significantly increased flexibility in supporting multiple credential collection methods. To support the use of multiple GINA models, a complex chaining method used to be required and custom GINAs often did not work with fast user switching .
The current Windows user information on the client computer is supplied by the web browser through a cryptographic exchange involving hashing with the Web server. If the authentication exchange initially fails to identify the user, the web browser will prompt the user for a Windows user account user name and password.
The Security Account Manager (SAM) is a database file [1] in Windows NT, Windows 2000, Windows XP, Windows Vista, Windows 7, 8.1, 10 and 11 that stores users' passwords. It can be used to authenticate local and remote users. Beginning with Windows 2000 SP4, Active Directory authenticates remote users.
[8] [14] NGSCB has yet to fully materialize; however, aspects of it are available in features such as BitLocker of Windows Vista, Measured Boot and UEFI of Windows 8, [15] Certificate Attestation of Windows 8.1, [16] Device Guard of Windows 10. [17] and Device Encryption in Windows 11 Home editions, with TPM 2.0 mandatory for installation.
This article is missing information about Fall Creators Update, Windows Hello, Microsoft Passport, Windows Spotlight, Enterprise Data Protection, Credential Guard or any of the Windows 10 security features. Please expand the article to include this information. Further details may exist on the talk page. (December 2017)
NTLMv2, introduced in Windows NT 4.0 SP4 [14] (and natively supported in Windows 2000), is a challenge-response authentication protocol. It is intended as a cryptographically strengthened replacement for NTLMv1, enhancing NTLM security by hardening the protocol against many spoofing attacks and adding the ability for a server to authenticate to ...