Design theory
A coordinatization of generalized quadrangles of order (s,s+2)
Journal of Combinatorial Theory Series A
Communications of the ACM
How to (really) share a secret
CRYPTO '88 Proceedings on Advances in cryptology
A signature with shared verification scheme
CRYPTO '89 Proceedings on Advances in cryptology
Threshold Schemes with Disenrollment
CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
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We construct and discuss new infinite classes of t-threshold schemes with t = 2 and 3 which are based on generalized quadrangles. The paper also contains threshold schemes which deal with the case where the group of trustees is made up of mutually distrusting parties.