There are two main ways: Key Encapsulation Mechanism (KEM), or a Key Exchange (KEX). In a KEM, Alice will create a symmetric key from a CSPRNG or TRNG, sign it with a private key and encrypt it with Bob's public key. RSA would be a scheme that can handle this. The other option is KEX.

What are encryption keys and how do they work? 🔐 | by Apr 16, 2018 Encrypted Key Exchange: Password-Based Protocols Secure exchange authenticated and secret information, such as a session key or a \ticket" for other services, a l a Kerberos [1]. This protocol, known as encrypted key exchange, or EKE, protects the password from o -line \dictionary" attacks. EKE can be used with a variety of asymmetric cryp-tosystems and public key distribution systems, subject Cipher Suites: Ciphers, Algorithms and Negotiating Named after Whitfield Diffie and Martin Hellman, this is a key exchange protocol, it’s NOT an asymmetric encryption protocol in the same vein as RSA though. The problem that Diffie and Hellman (using work inspired by Ralph Merkle) set out to solve was how to exchange a secure key over an unsecure network with an attacker watching. encryption - Format for data & symmetric key exchange

Dec 10, 2018

The key for encryption and decryption is what ratcheted key exchange referred to as the output key. Besides a natural correctness requirement, we have a robustness requirement: if the receiver receives an update that it rejects, it maintains its state and will still accept a subsequent correct 3

Sonicwall Analyzer- Encrypted Key Exchange - Spiceworks

Common Encryption Types, Protocols and Algorithms Explained Dec 10, 2018