Cryptanalysis and improvement of a multisignature scheme

Authors:
Manik Lal Das;Ashutosh Saxena;V. P. Gulati
Affiliations:
Institute for Development and Research in Banking Technology, Hyderabad, India;Institute for Development and Research in Banking Technology, Hyderabad, India;Tata Consultancy Services, Software Units Layout, Madhapur, Hyderabad, India
Venue:
IWDC'05 Proceedings of the 7th international conference on Distributed Computing
Year:
2005

Citing 4
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Abstract

A multisignature scheme for implementing safe delivery rule in group communication systems (MSGC) was recently proposed by Rahul and Hansdah. In this paper we show that the MSGC scheme is insecure against forgery attack and signature integrity attack. We propose an improved scheme that resists the weaknesses of MSGC scheme.