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An identity-based threshold key management scheme without secure channel is proposed for ad hoc network. The master private key, which is shared among all nodes by the Shamir's secret sharing scheme, is produced by all nodes when network is formed. The nodes' public keys are derived from their identities. In order to get the private key, each node needs to prove their identity to distributed CAs using...
D. Catalano, R. Gennaro and S. Halevi had proposed a modular inversion protocol for computing a shared RSA private exponent. In this paper, we propose the security analysis of this shared modular inversion protocol. Firstly, we prove that Catalano-Gennaro-Halevi protocol is insecure when the public exponent is larger than a specific integer. Secondly, it is shown that a fraction of the private exponent...
How to protect the security of vital data is one of the most important issues of the database security. An efficient method is to divide the vital data into multiple parts that are stored among a group of servers by secret sharing technique. In this paper, we propose a publicly verifiable dynamic sharing protocol for data secure storage. In this protocol, the important data can be publicly verifiably...
In this paper a verifiable multiple-players enrollment protocol for threshold schemes is presented. The protocol allows distributing new shares to a group of new enrollment players, but old shareholders need not change their shares. The dishonest behavior of old shareholders can be detected and the new enrollment players can assure to get the right shares. The new protocol is very efficient compared...
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