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摘要:
As user's certification issues by the only certificate authority (CA), the existing scheme can not prevent CA to get the user's services from a service provider. An improved scheme was presented. In that scheme, it was still the single CA model and the two stages. Certificate application stage: different with the existing scheme, CA issued the part certificate for the users and the final certificate was generated by adding its own private information. Service request phase: a user requested service to a service provider by calculating the certificate commitment, in the stage, even though CA (or other attackers) could guess correctly the final user certificate, they needed to solve the discrete logarithm problem in order to calculate the user's certificate commitment. This new scheme solves the existing scheme security problem and its safety and efficiency have also improved significantly compared with the similar scheme.
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来源 :
Journal of Huazhong University of Science and Technology (Natural Science Edition)
ISSN: 1671-4512
年份: 2011
期: 10
卷: 39
页码: 61-63,68