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The user authentication is instantiated by a shared secret, one in the smartcard, for example a SIM card inside the mobile phone and the other is on the HLR/HSS. GBA authenticates by making a network component challenge the smartcard and verify that the answer is the one predicted by the HLR/HSS.
The resource identified by the request is only capable of generating response entities that have content characteristics but not acceptable according to the Accept header field sent in the request. [1]: §21.4.7 407 Proxy Authentication Required The request requires user authentication. This response is issued by proxies. [1]: §21.4.8
The phone number we contact you with may be different each time. Enable 2-step for phone. 1. Sign in to your Account Security page. 2. Next to "2-Step Verification," click Turn on. 3. Select Phone number for your 2-step verification method. 4. Follow the on-screen prompts to complete the process. Sign in with 2-step for phone. 1.
A mutual authentication process that exchanges user IDs may be implemented as follows: [citation needed] Alice sends a message encrypted with Bob's public key to Bob to show that Alice is a valid user. Bob verifies the message: Bob checks the format and timestamp. If either is incorrect or invalid, the session is aborted.
In computing, the Challenge-Handshake Authentication Protocol (CHAP) is an authentication protocol originally used by Point-to-Point Protocol (PPP) to validate users. CHAP is also carried in other authentication protocols such as RADIUS and Diameter. Almost all network operating systems support PPP with CHAP, as do most network access servers.
Two-factor authentication is a 'strong authentication' method, as it adds another layer of security to the password reset process. In most cases this consists of Preference Based Authentication plus a second form of physical authentication (using something the user possesses, i.e. Smartcards, USB tokens, etc.).
Sign in and go to the AOL Account security page.; Under "2-Step Verification," click Turn on.; Click Security Key.; Follow the onscreen steps to add your Security Key. Add additional recovery methods in case your Security Key is lost.
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 ...