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Personal station authentication system and authentication method

  • US 6,134,431 A
  • Filed: 10/06/1997
  • Issued: 10/17/2000
  • Est. Priority Date: 10/07/1996
  • Status: Expired due to Fees
First Claim
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1. A radio communication exchange system managing a closed service area, and comprising at least one cell station for communicating with each of a plurality of personal stations entering said closed service area by a radio line and an exchange connected to said cell station, in which:

  • each of said plurality of personal stations includes identification information storing means for storing predetermined identification information of said each personal station, and private key storing means for storing a private key defined inherent to said each personal station in a public key cryptosystem,said exchange includes public key requesting means by which, when a personal station enters said closed service area, a public key management device for storing and managing a public key as a counterpart key of a private key in said public key cryptosystem in association with said identification information of each of said plurality of personal stations is requested for a public key of said personal station thus entering, and receiving means for receiving said public key of said entering personal station from said public key management device, andinformation obtained by enciphering or deciphering information for authentication based on said public key received by said exchange and said private key stored in said entering personal station is transferred between said exchange and said entering personal, and said exchange authenticates said entering personal station by making, on the basis of said transferred information, judgement as to consistency between said public key received by said exchange and said private key stored in said entering personal station.

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