摘要
Due to forward-secure-digital-signature＇s capability of effectively reducing loss caused by exposure of secret keys and significant in-application benefits of blind signature aiming at protecting senders＇ privacy, they have been hot spots for decades in the field of cryptography. Illuminated by the integration of forward secure digital signature and blind signature, based on the variants of E1Gamal and assumption of difficulty in solving the discrete logarithm problem in galois field, a forward-secure weak blind signature scheme and a forward-secure strong blind signature scheme are proposed and their security is analyzed thoroughly in this paper. It turns out that forward security, blindness and aptitude of resisting forging attack demonstrated by these two schemes benefit a lot theoretically and practically.
Due to forward-secure-digital-signature’s capability of effectively reducing loss caused by exposure of secret keys and significant in-application benefits of blind signature aiming at protecting senders’ privacy,they have been hot spots for decades in the field of cryptography.Illuminated by the integration of forward secure digital signature and blind signature,based on the variants of ElGamal and assumption of difficulty in solving the discrete logarithm problem in galois field,a forward-secure weak blind signature scheme and a forward-secure strong blind signature scheme are proposed and their security is analyzed thoroughly in this paper.It turns out that forward security,blindness and aptitude of resisting forging attack demonstrated by these two schemes benefit a lot theoretically and practically.
基金
This work was supported by the National Natural Science Foundation of China for Grant 60673127, the National High Technology Research and Development Program of China （863 Program） for Grant 2007AA01Z404, the Science ＆ Technology Pillar Program of Jiangsu Province for Grant BE2008135, the Electronic Development Foundation of the Ministry of Information Industry, Funding of Jiangsu Innovation Program for Graduate Education for Grant CX10B112Z, Funding for Outstanding Doctoral Dissertation in NUAA for Grant BCXJ10-07, Research Funding of Nanjing University of Aeronautics and Astronautics for Grant NS2010101 and Jiangsu Province Postdoctoral Science Foundation. We wish to thank the above support, under which the present work is possible.
