In cryptography, a key memorandum of understanding is a protocol in which two or more parties can agree on a key so that both influence the outcome. If this is done correctly, it prevents undesirable third parties from imposing an important decision on the appropriate parties. Protocols that are useful in practice also do not reveal to a listening party the key that has been agreed upon. In key cryptographic equipment (key exchange, key negotiation), there is a process or protocol, with a common secret for two parties, for the next cryptographic use, usually for encrypted communications. Operating techniques can be key agreements or important transportation systems. Many key exchange systems have a part that generates the key and simply sends that key to the other party — the other party has no influence on the key. The use of a key MEMORANDUM of understanding avoids some of the major distribution problems associated with these systems. Key mous that is verified by the password requires the separate implementation of a password (which may be smaller than a key) in a way that is both private and integrity. These are designed to withstand man-in-the-middle and other active attacks on the password and established keys. For example, DH-EKE, SPEKE and SRP are Diffie-Hellman password authentication variants. A large number of cryptographic authentication schemes and protocols have been designed to provide authenticated key agreements to prevent man-in-the-middle and related attacks. These methods typically attach the mathematically agreed key to other agreed data, such as: I only work with RSA keys, so the exchange methods are RSA (encrypt it, encrypt it and send it over it) and [EC]DHE_RSA (generate a leak key [EC]DH, sign it, and use it for a key agreement).
Authenticated Key Exchange (EFT) is the exchange of session keys in a key exchange protocol that also authenticates the identities of the parties involved (for example. B, a password, a public key or a digital certificate). If you. B you connect to a password-protected WiFi network, an authenticated key protocol for the agreement is used, in most cases the agreement with the keys authenticated by the password (PAKE). If you connect to a public wi-fi network, an anonymous key agreement is put in place. Key agreement algorithms verified by the password can exchange cryptographic keys using knowledge about a user`s password. The key agreement refers to a key exchange form (see also key key) in which two or more users execute a protocol in order to safely release a resulting key value. An important transport protocol can be used as an alternative to the key agreement. The distinguishing feature of a key MOU is that participating users contribute equally to the calculation of the resulting common key value (unlike a user who calculates and distributes a key value to other users). Examples of key exchange systems: Diffie-Hellman (DH) and Elliptic-curve Diffie-Hellman (ECDH), RSA-OAEP and RSA-KEM (key transport RSA), PSK (preinstalled key) ), SRP (Secure Remote Password protocol), FHMQV (Fully Hashed Menezes-Qu-Vanstone), ECMQV (Ellictic-Curve Menezes-Qu-Vanstone) and CECPQ1 (quantum-safe key agreement). The exponential key exchange itself does not indicate prior agreement or subsequent authentication between participants.