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Threshold cryptography distributes the ability to provide a cryptographic service such as decryption or signing. It is an ideal choice to provide security services, such as authentication and access control, in MANETs or P2P systems. The paper proposes an ID- based threshold signature scheme, which has three attractive properties: (1) The user's co-signing key and signature share are all verifiable,...
Lack of online trusted dealer and group membership dynamics make the membership control become a challenging task in wireless ad hoc network. Based on the threshold cryptography (and verifiable secret sharing), we propose a secure membership control scheme using a new threshold signature based on the RSA variant. Compared with other proposed solutions based on RSA, the scheme does not need the operation...
The (t, n) threshold cryptography is an important method for sharing a group secret message in dynamic groups such as ad hoc groups. Using subliminal channel, one can send a secret message to an authorized receiver and the message cannot be discovered by any unauthorized receivers; it satisfies different requirements of different kind of users. We discussed the security of HCW scheme and proposed...
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