JISE

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Journal of Information Science and Engineering, Vol. 27 No. 4, pp. 1303-1313

Group Oriented Renewal of Secrets and Its Application to Secure Multicast

J. A. M. NARANJO, L. G. CASADO AND J. A. LOPEZ-RAMOS
Department of Computer Architecture and Electronics
University of Almeria
Almeri, 04120 Spain

This paper introduces a multicast method for renewing secrets which are shared by a set of hosts. The method is centralized, secure, efficient, scalable to a reasonable size and compatible with any multicast topology configuration underneath. It can be used to achieve privacy in a centralized multicast overlay. Additionally, the method can be used to renew an asymmetric key pair when a cryptosystem based on discrete logarithm is used. Knowledge of the public key is then restricted to the group it is communicated to. Security and scalability are discussed, and a comparison with other well-known alternatives is shown.

Keywords: communication/networking and information technology, network operations, data encryption, secure group communication, multicast

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