Identity Based On-Line/Off-Line Signature With Designated Verifier

摘要

It's necessary to equip WSNs with authentication mechanism accounts for that the nodes of WSNs are vulnerable to various attacks since they are open and resource-limited. However, the traditional authentication such as signature cannot be utilized to achieve this goal, because of its heavy computation. On-line/off-line signature can be considered as a practical solution for authentication WSNs, because the WSNs nodes only need to perform lightweight on-line sign, while the heavy computation can be performed off-sign phase using efficient computational devices, but it is not perfect for certain circumstances. For example, the signer unwilling to expose the message of the signatures, such as personal health records, to others. How to achieve confidence and efficiency simultaneously remains a problem for WSNs. In this paper, we present a strong designated on-line/off-line signature scheme for WSNs, which can ensure the confidence as well as security simultaneously. The proposed scheme is proven to be secure under the BDH assumption and its computation cost is acceptable for the nodes of WNSs.