Conference Key Distribution System Research Articles

A new threshold scheme and its application in designing the conference key distribution cryptosystem

This paper presents a new threshold scheme, which is based on the definition of cross-product in an N-dimensional vector space. By employing this scheme, the single-system master key can be shared among multiple users. It provides a protection of property against problems such as abnegation incidents or betrayal incidents. This scheme can also be applied for designing conference key distribution systems.

New public-key distribution systems

A few new public-key distribution systems are proposed in the letter. All these new systems are generalised to conference key distribution systems (CKDSs).

Identity-based conference key distribution system

We propose an identity-based key distribution system to generate a common secret conference key for three or more users. Users are connected in a ring so that each user sends messages to the neighbouring user to generate a conference key. These messages are authenticated using each user's identification information.

Identity-based conference key distribution systems in broadcast networks

Identity-based conference key distribution systems in a complete graph network or a star network are proposed. Messages among two or more users are authenticated using each user's identification information. Security and transmission efficiency for the proposed schemes are also shown.

A conference key distribution system

Encryption is used in a communication system to safeguard information in the transmitted messages from anyone other than the intended receiver(s). To perform the encryption and decryption the transmitter and receiver(s) ought to have matching encryption and decryption keys. A clever way to generate these keys is to use the public key distribution system invented by Diffie and Hellman. That system, however, admits only one pair of communication stations to share a particular pair of encryption and decryption keys, The public key distribution system is generalized to a conference key distribution system (CKDS) which admits any group of stations to share the same encryption and decryption keys. The analysis reveals two important aspects of any conference key distribution system. One is the multitap resistance, which is a measure of the information security in the communication system. The other is the separation of the problem into two parts: the choice of a suitable symmetric function of the private keys and the choice of a suitable one-way mapping thereof. We have also shown how to use CKDS in connection with public key ciphers and an authorization scheme.