A self-certified group-oriented cryptosystem without a combiner

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.SCOPUS: cp.kinfo:eu-repo/semantics/published4th Australasian Conference on Information Security and Privacy, ACISP 1999; Wollongong; Australia; 7 April 1999 through 9 April 1999; Code 14902