Jackson, W.A.Martin, K.2006-06-192006-06-191996Designs, Codes and Cryptography, 1996; 9(3):267-2860925-10221573-7586http://hdl.handle.net/2440/3534A perfect secret sharing scheme is a system for the protection of a secret among a number of participants in such a way that only certain subsets of these participants can reconstruct the secret, and the remaining subsets can obtain no additional information about the secret. The efficiency of a perfect secret sharing scheme can be assessed in terms of its information rates. In this paper we discuss techniques for obtaining bounds on the information rates of perfect secret sharing schemes an illustrate these techniques using the set of monotone access structures on five participants. We give a full listing of the known information rate bounds for all the monotone access structures on five participants. © 1996 Kluwer Academic Publishers.en© 1996 Kluwer Academic PublishersJournal article0030006476001996384610.1007/bf001297692-s2.0-000165294470482Jackson, W.A. [0000-0002-0894-0916]