In this paper, a novel key management model and algorithm for two-tier architecture network are proposed based on elliptic curve cryptosystem (ECC) combined with public key (CPK) technology, verifiable secret sharing technology, and two-tier architecture network technology. This novel key management algorithm is composed of several sub-algorithms, such as key generation, key update, nodes joini...

Three parties, Alice, Bob and Eve, know the sequences of ran-generated by a discrete memoryless source according to some probability distribution P XY Z. Motivated by Wyner's and Csiszz ar and KK orner's pioneering definition of, and work on, the secrecy capacity of a broadcast channel, the secret key rate of P XY Z was deened by Maurer as the maximal rate M=N at which Alice and Bob can generat...

A Key Distribution Center of a network is a server enabling private communications within groups of users. A Distributed Key Distribution Center is a set of servers that jointly realizes a Key Distribution Center. In this paper we build a robust Distributed Key Distribution Center Scheme secure against active and mobile adversary. We consider a general access structure for the set of servers an...

Abs t rac t . A publicly verifiable secret sharing (PVSS) scheme, named by Stadler in [Sta96], is a special VSS scheme in which anyone, not only the shareholders, can verify that the secret shares are correctly distributed. The property of public verifiability is what the first proposed VSS scheme [CGMA85] incorporated but later protocols [GMW87, Fe187, Ped911 failed to include. PVSS can provid...