JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2015, Vol. 50 ›› Issue (11): 52-59.doi: 10.6040/j.issn.1671-9352.0.2014.442

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Improvement of a certificateless aggregate signature scheme

NONG Qiang, HUANG Zhen-jie, HUANG Ru-fen   

  1. Department of Computer Science, Minnan Normal University, Zhangzhou 363000, Fujian, China
  • Received:2014-09-29 Revised:2015-11-11 Online:2015-11-20 Published:2015-12-09

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Abstract: Three forgery attack algorithms on the existing certificateless aggregate signature scheme using the intractability of computational Diffie-Hellman problem were presented. It was found that the "malicious-but-passive" or the "honest-but-curious" key generation center could forge a valid aggregate signature on any message on behalf of any user. The scheme also can not resist collusion attack by dishonest users. The reasons of insecurity of the original scheme were analyzed. By means of adding the user's public key as an input parameter in the stage of partial private key generation, and binding the partial private key and secret value to different Hash functions respectively in the stage of signature generation, an improved scheme without secure channel and bilinear pairing was proposed. The security of the improved scheme can be reduced to the more general discrete logarithm problem.

Key words: certificateless aggregate signature, secure channel, discrete logarithm problem, bilinear pairing, forgery attack

CLC Number: 

  • TP309
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