Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
A key distribution system equivalent to factoring
Journal of Cryptology
Cryptosystem for group oriented cryptography
EUROCRYPT '90 Proceedings of the workshop on the theory and application of cryptographic techniques on Advances in cryptology
Joint encryption and message-efficient secure computation
CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Communications of the ACM
A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
Society and Group Oriented Cryptography: A New Concept
CRYPTO '87 A Conference on the Theory and Applications of Cryptographic Techniques on Advances in Cryptology
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
On the Security of Self-Certified Public Keys
International Journal of Information Security and Privacy
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In a (t, n) group-oriented cryptosystem, collaboration of at least t participants is required to perform the group transformation. Two important issues in implementation of a such cryptosystems are: 1. the sender needs to collect authenticated public keys of the intended receivers; 2. the combiner needs a secure channel to collect (privately) the partial results from collaborating participants. This paper discusses the above problems and proposes a (t, n) group-oriented cryptosystem that works with self-certified public keys, with no help of any combiner.