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How does exchange session key work?

Symmetric-key algorithm

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Session key exchange involves the establishment of a shared key between entities for secure communication. Various methods exist, such as utilizing public-private key pairs for encryption and decryption. In some cases, session keys are generated based on device-specific information like fingerprints and secret values. Additionally, innovative approaches leverage network delays to create session keys without relying on third-party mechanisms. Efficient key generation is crucial, with some protocols generating multiple keys per exchange to enhance security and prevent data leakage. Overall, session key exchange methods aim to ensure secure communication by enabling entities to establish shared keys while mitigating risks associated with unauthorized access.

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Patent Key exchange through partially trusted third party Matthew J. Campagna 11 Dec 2015 9 Citations	Clients trust a cryptography service for authentication and verification to establish a secure communication session without granting access to the session, ensuring secure key exchange through a partially trusted third party.
Book Chapter•DOI Self-parameter Based Bilateral Session Key Exchange Method Kun-Lin Tsai, Fang-Yie Leu, Shuo-Wen Chang - Show less +2 more 27 Oct 2018	The Self-Parameter based Bilateral Session Key Exchange Method (BSKE) generates 16 keys using device parameters and elliptic curve cryptography, enhancing efficiency and security against various attacks.
Patent Secret key exchange method, system and device based on network delay and storage medium Huang Jie, Wang Wei - Show less +1 more 24 Nov 2020	The session key exchange method utilizes network delay and a storage medium to transmit random numbers between user terminals, enabling secure key generation without third-party involvement.
Patent System and method of session key generation and exchange Dunjic Milos, Perry Aaron Jones Haldenby, Arthur Carroll Chow, Nguyen Anthony Haituyen, Patel Het Anand, Doyle Casey Lyn, Liu Yubing, John Jong Suk Lee, Tax David Samuel, Arun Victor Jagga - Show less +9 more 05 Oct 2017 4 Citations	The session key exchange involves generating a key based on device fingerprint, shared secret, token, and counter for secure communication between device and server during payment transactions.
Patent Session key exchange as a service Chen Huamin, Vyas Jay - Show less +1 more 29 Nov 2018 1 Citations	The session key exchange involves receiving encrypted session key and client's public key, decrypting with server's private key, re-encrypting for client, and facilitating authentication between client and server.

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