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A logic for the exclusion basis system

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1 Author(s)
Redwine, Jr., Samuel T. ; James Madison Univ., Harrisonburg, VA, USA

In 2003, Morales and coauthors published the broadcast/multicast-oriented exclusion basis system (EBS) that imposes low server and communication loads to securely broadcast new keys to the other participants after an individual participant leaves. This paper provides a method for dealing with multiple participants leaving simultaneously. In doing so it develops a general approach to encrypting messages to restrict them to a subset of participants defined by the keys they know as described by a logical expression. Difficulties presented by and countermeasures to collusion by EBS participants are discussed.

Published in:

System Sciences, 2004. Proceedings of the 37th Annual Hawaii International Conference on

Date of Conference:

5-8 Jan. 2004