Authenticated Key Agreement

The key password authentication agreement typically includes methods such as: Password-certified key call is a process in which a client obtains a static key in a password-based negotiation with a server that knows the data related to the password, for example. B the Ford and Kaliski methods. In the strictest setting, a party uses only one password associated with N servers (two or more) to retrieve a static key. This is concluded in a way that protects the password (and key), even if N − 1 of the servers are completely compromised. Password Authenticated Key Exchange (PAKE) is when two or more parties, solely on the basis of their knowledge of a password, establish a cryptographic key by exchanging messages, so that an unauthorized party (who controls the communication channel but does not have the password) cannot participate in the method and is, where possible, limited by password brute force rates. (The optimal case gives exactly one guess per pass exchange.) Two forms of PAKE are balanced and augmented methods. If you have a secure way of integrity to verify a released key through a public channel, you can perform a Diffie Hellman key exchange to deduce a short-term released key and then authenticate that the keys match. One possibility is to use an authenticated reading of the key, as in PGPfone. However, voice authentication assumes that it is not possible for a man in the middle to simulate a participant`s voice in real time, which can be an undesirable hypothesis. These protocols can be designed to work with a small public value, for example.

B a password. Variations in this regard have been proposed for Bluetooth pairing protocols. In cryptography, a password-authenticated key agreement method is an interactive method for two or more parties to create cryptographic keys based on the knowledge of one or more parties through a password. The first successful methods for password-authenticated key agreement were encrypted key exchange methods described in 1992 by Steven M. Bellovin and Michael Merritt. Although some of the early methods were flawed, the surviving and improved forms of EKE effectively reinforce a common password to form a common key that can then be used for message encryption and/or authentication. The first PAKE protocols were implemented by M. Bellare, D. Pointcheval and P. Rogaway (Eurocrypt 2000) and V. .

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