Abstract
In any conditional access system, the broadcast content is encrypted with the secret key to protect it from unauthorized users. The secret key is shared by server and a authorized user and a key transport protocol is used to transfer the secret key securely to these users. In this paper we introduce a scalable key transport protocol based on Chinese remainder theorem for single as well as multiple access control. In this protocol, user or user device has to carry only two keys. To decode the broadcast message, only one modular division and one decryption is sufficient. The main advantage of our scheme is that, a server can update the scrambling key or group key in one message, without changing user’s key. The proposed protocol is scalable and it can be used for multiple access control, which is useful in Pay TV, without increasing communication and computation overhead on user as well as the server.
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Joshi, M.Y., Bichkar, R.S. (2013). Scalable Key Transport Protocol Using Chinese Remainder Theorem. In: Thampi, S.M., Atrey, P.K., Fan, CI., Perez, G.M. (eds) Security in Computing and Communications. SSCC 2013. Communications in Computer and Information Science, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40576-1_39
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DOI: https://doi.org/10.1007/978-3-642-40576-1_39
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-40575-4
Online ISBN: 978-3-642-40576-1
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