Abstract
Private key escrow is an inherent disadvantage for ID-based cryptosystem, i.e., the PKG knows each signer’s private key and can forge the signature of any signer. Blind signature plays a central role in electronic cash system. Private key escrow is more severe in electronic cash system since money is directly involved. To avoid the key escrow problem, we propose an ID-based blind signature and proxy blind signature without trusted PKG. If the dishonest PKG impersonates an honest signer to sign a document, the signer can provide a proof to convince that the PKG is dishonest.
This work is supported by Sony (China) research laboratory. This work is supported by National Natural Science Foundation of China (No. 90604022, 60673098), and National Basic Research Program of China (973 Program) (No. 2007CB310704).
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Yu, Y., Zheng, S., Yang, Y. (2008). ID-Based Blind Signature and Proxy Blind Signature without Trusted PKG. In: Sarbazi-Azad, H., Parhami, B., Miremadi, SG., Hessabi, S. (eds) Advances in Computer Science and Engineering. CSICC 2008. Communications in Computer and Information Science, vol 6. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-89985-3_111
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DOI: https://doi.org/10.1007/978-3-540-89985-3_111
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