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Mathematical Problems in Engineering
Volume 2014, Article ID 429271, 13 pages
Research Article

Cryptanalytic Performance Appraisal of Improved CCH2 Proxy Multisignature Scheme

Department of Computer Science and Engineering, DAV Institute of Engineering and Technology, Jalandhar, Punjab 144004, India

Received 28 August 2013; Revised 7 November 2013; Accepted 10 February 2014; Published 27 April 2014

Academic Editor: Wang Xing-yuan

Copyright © 2014 Raman Kumar and Nonika Singla. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Many of the signature schemes are proposed in which the out of threshold schemes are deployed, but they still lack the property of security. In this paper, we have discussed implementation of improved CCH1 and improved CCH2 proxy multisignature scheme based on elliptic curve cryptosystem. We have represented time complexity, space complexity, and computational overhead of improved CCH1 and CCH2 proxy multisignature schemes. We have presented cryptanalysis of improved CCH2 proxy multisignature scheme and showed that improved CCH2 scheme suffered from various attacks, that is, forgery attack and framing attack.