A scheme of fair exchange of signatures based on bilinear aggregate signatures
Cai Man-chun · Journal of China Institute of Communications · 2004
The scheme of fair exchange of digital signatures was an important tool to signing digital contracts, e-payment and other electronic commerce actions. Its efficient realization had still been pursued since it appeared. Based on Boneh's bilinear verifiable encrypted signature scheme that assumed the so-called computational co-Diffie-Hellman problem be difficult on the bilinear group pair, a scheme of fair exchange of digital signatures was proposed in this paper. The scheme has the properties of short signature, low computation and verification cost. It can exchange signatures of two parties aided by bilinear mapping very efficiently and fairly.