Key distribution schemes

A key distribution scheme is a method used to distribute off-line initial private pieces of information among a set of users, such that each group of them can compute a common key for secure conference. This information is generated and distributed by a trusted server which is active only at the distribution phase. Key distribution is a central problem in cryptographic systems, and is a major component of the security subsystem of distributed systems, communication systems, and data networks. We consider the case in which users are allowed to interact after receiving the keys.<
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