Non-interactive secure multiparty key establishment

Abstract

Cryptographic schemes that provides establishment of secret
keys among a number of participants are generally known as conference
key establishment schemes and key broadcasting schemes. In any case,
such protocols provide secure establishment of group-oriented cryptographic
keys, but amongst others, with costs of multiple transmissions of
key establishment messages and in some cases multiple secret user keys.
In this paper, we present a simple and straight-forward efficient noninteractive
group-oriented key establishment scheme that provides offline
computation of secret group keys, without computations and transmissions
of key establishment messages.