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A Study of Wireless LAN Cryptosystem for Supporting Realtime Mutual Authentication

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2005, 10(5), pp.161-170
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

Lee,Sang-Ryul 1

1상지영서대학교

Candidate

ABSTRACT

The Certificate Revocation List(CRL) or the Online Certificate Status Protocol(OCSP) has been used to validate certificates. However, the CRL cannot validate certificates in realtime because of the Time-Gap problem and the OCSP server overloads in a large scale secure system. In addition, the client cannot access a wired LAN until the client has been authenticated by the authentication server on the IEEE 802.1x framework. Therefore, the client cannot validate the authentication server's certificate using a certificate validation server. Thus, the client cannot authenticate the authentication server in realtime. To solve these problems this paper designed a secure system that can protect the content of communications and authenticate users in realtime on a wireless LAN. The designed certificate validation protocol was proved that the stability and efficiency of the system was very high, the result of the validation had the presence, the speed of the validation was not affected by the system scale, the number of authorities user must trust was reduced to one, and the overload of the validation server was protected. And the designed user authentication and key exchange protocols were proved that the mutual authentication was possible in realtime and the fact of the authentication could be authorized by the CA because of using the authorized certificates.

Citation status

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