Systems for challenge-response authentication must be well described. What makes it more secure than a password-based approach is not immediately obvious, but it does.
Systems for challenge-response authentication must be well described. What makes it more secure than a password-based approach is not immediately obvious, but it does.
The system operates by giving a challenge to the user, who then answers with a challenge-specific response. The user is then authenticated using the challenge and response. A challenge-response mechanism is used in several security protocols, including Kerberos, PGP, and SSH.
Challenge-response authentication systems are intended to be more secure than standard password-based systems in validating a user's identity. A challenge-response system prompts the user to input their login and password.
After the user enters their credentials, the system will produce a challenge, which is often a random string of characters. The user must next enter the challenge into the system, which confirms the user's identification.
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