Efcient Multi-Party Digital Signature using Adaptive Secret Sharing for Low-Power Devices in Wireless Networks

In this paper, we propose an efcient multi-party signature scheme for wireless networks where a given number of signees can jointly sign a document, and it can be veried by any entity who possesses the certied group public key. Our scheme is based on an efcient threshold key generation scheme which is able to defend against both static and adaptive adversaries. Specically, our key generation method employs the bit commitment technique to achieve efciency in key generation and share refreshing; our share refreshing method provides proactive protection to long-lasting secret and allows a new signee to join a signing group. We demonstrate that previous known approaches are not efcient in wireless networks, and the proposed multi-party signature scheme is exible, efcient, and achieves strong security for low-power devices in wireless networks.