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The simplest example of a challenge-response protocol is password authentication, where the challenge is asking for the password and the valid response is the correct password. An adversary who can eavesdrop on a password authentication can authenticate themselves by reusing the intercepted password. One solution is to issue multiple passwords ...
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.
If a strong two-factor authentication system is used, the stolen passwords cannot be stored and later used because each one-time password is valid for only one authentication session, and will fail if tried a second time. [1] multiOTP is a PHP class library. The class can be used with any PHP application using a PHP version of 5.3.0 or higher.
PostgreSQL claims high, but not complete, conformance with the latest SQL standard ("as of the version 17 release in September 2024, PostgreSQL conforms to at least 170 of the 177 mandatory features for SQL:2023 Core conformance", and no other databases fully conformed to it [79]). One exception is the handling of unquoted identifiers like ...
Alice then has an authentication of Bob, and Bob has authentication of Alice. Taken together, they have mutual authentication. DIGEST-MD5 already enabled mutual authentication, but it was often incorrectly implemented. [2] [3] When Mallory runs a man-in-the-middle attack and forges a CA signature, she could retrieve a hash of the password.
Many databases (such as PostgreSQL) only allow one operation to be performed at a time on each connection. If a request for data (a SQL Select statement) is sent to the database and a result set is returned, the connection is open but not available for other operations until the client finishes consuming the result set.
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 ...
Authentication against Windows domain servers with a supplied user name/password combination. Displaying of a legal notice to the user prior to presenting the logon prompt. Automatic Logon, allowing for a user name and password to be stored and used in place of an interactive logon prompt.