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Identity-Based Key Issuing Without Secure Channel in a Broad Area

  • Saeran Kwon
  • Sang-Ho Lee
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4298)

Abstract

Despite many advantages of identity (ID)-based cryptosystems in removing certificates of public keys over the traditional public key cryptosystems (PKC), some problems related to the inherent key escrow property, user authentication and the need for the confidential channel for private key distribution remain as important issues to be resolved. In this paper, we propose a new key issuing scheme reasonably reducing the burden employed to a trust key issuing authority called key generation center (KGC) in checking the identifications of all users maintained by the KGC by means of separating the duties of the KGC; user identification function by a local trust authority, and private key extracting and issuing function by the KGC, respectively. Furthermore, our scheme provides secure transmission channel through blinding technique between the KGC and users, and deals efficiently with the key escrow problem. Hence, our scheme makes ID-PKC more applicable to real environment, and cover the wider area.

Keywords

Bilinear Pairing Trust Authority Blind Signature Scheme Polynomial Time Adversary Blinding Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Berlin Heidelberg 2007

Authors and Affiliations

  • Saeran Kwon
    • 1
  • Sang-Ho Lee
    • 1
  1. 1.Dept. of Computer Science and Engineering, Ewha Womans University, 11-1 Daehyun-Dong, Seodaemoon-Gu, SeoulKorea

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