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A novel key management scheme for dynamic multicast communications
Author(s) -
Chang ChinChen,
Cheng YiFang,
Lin IuonChang
Publication year - 2009
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.958
Subject(s) - computer science , session key , multicast , computer network , secure multicast , key management , key (lock) , overhead (engineering) , scheme (mathematics) , source specific multicast , xcast , session (web analytics) , distributed computing , computer security , encryption , pragmatic general multicast , mathematical analysis , mathematics , world wide web , operating system
Secure multicasting allows the sender to deliver an identical secret to an arbitrary set of recipients through an insecure broadcasting channel, whereas the unintended recipients cannot obtain the secret. A practical approach for securing multicast communications is to apply a session key to encrypt the transmitted data. However, the challenges of secure multicast are to manage the session keys possessed by a dynamic group of recipients and to reduce the overhead of computation and transmission when the membership is changed. In this paper, we propose a new key management scheme for dynamic multicast communication, which is based on privacy homomorphism and Chinese remainder theorem. Our scheme can efficiently and securely deliver an identical message to multiple recipients. In particular, the complexity of the key update process in our scheme is O (1). Copyright © 2008 John Wiley & Sons, Ltd.