Identity Based Signcryptin Scheme with Forward Security and Public Verifiability

In this paper,by conducting an investigation in signcryption schemes with forward security and public verifiability and based on Liber and Quisquaters signcryption schemes,a new signcryption scheme is proposed,and its security and efficiency are analyzed at the same time.The result shows that the new signcryption scheme proposed can provide forward security and public verifiability simultaneously;moreover,it has the property of shorter length of parameter key and simple management is simple compared with the traditional PKI owing to the use of Id-based PKC and bilinear pairing technique in the scheme;therefore,it has the same efficiency with the LQ signcryption scheme.This work of giving such an efficient and secure signcryption scheme is not only significant in theory in solving the related public problem but also has practical value for the high level requirement of practical application such as the electronic business.