Personal station authentication system and authentication method
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A public key cryptosystem is used for the authentication of a personal station (PS) which subscribes for a plurality of radio communication exchange systems. A public key of PS is registered into a public key DB of a public key management device. A private key is registered into PS. When PS moves into a service area of a certain radio communication exchange system, an exchange in that radio communication exchange system requests the public key management device for a public key of PS and makes a check for authentication of PS based on the public key cryptosystem by use of the received public key. Thereafter, when PS moves into a service area of another radio communication exchange system, an exchange in the other radio communication exchange system similarly requests the public key management device for a public key of PS and receives the same public key. The exchange in the other radio communication exchange system makes a check for authentication of PS based on the public key cryptosystem by use of the received public key. In the case where the authentication between each radio communication exchange system and PS results in success, each radio communication exchange system can determine a peculiar authentication key to inform PS of the peculiar authentication key so that the authentication of PS from that time onward is performed using the peculiar authentication key.
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Citations
24 Claims
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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:
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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, and information 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 23)
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9. An exchange in a radio communication exchange system managing a closed service area, and comprising a cell station connected to said exchange for communicating with each of a plurality of personal stations entering said closed service area by a radio line, and a public key management device for managing a predetermined public key in association with predetermined identification information of each of said plurality of personal stations, each of said plurality of personal stations storing a private key, said exchange comprising:
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public key requesting means responsive to entrance of a personal station within said closed service area, for requesting said public key management device for a public key corresponding to identification information of said personal station thus entering; and receiving means for receiving said public key transmitted from said public key management device, in which information obtained by enciphering or deciphering information for authentication on the basis of 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 station, 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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10. A public key management device in a radio communication exchange system managing a closed service area, and comprising an exchange connected to a cell station for communicating with each of a plurality of personal stations entering said closed service area by a radio line, said public key management device comprising:
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storing means for storing a predetermined public key in association with predetermined identification information of each of said plurality of personal stations; and transmitting means for making, when a request for a public key corresponding to the identification information of each of said plurality of personal stations, a search of said storing means to acquire a public key corresponding to said identification information and transmitting the acquired public key.
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11. A personal station in a radio communication exchange system managing a closed service area, and comprising a cell station for communicating with said personal station by a radio line when said personal station enters said closed service area, and an exchange connected to said cell station, said personal station comprising:
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private key storing means for storing a private key of said personal station corresponding to a counterpart public key held in said exchange; processing means for performing authentication of said personal station on the basis of a predetermined public key cryptosystem by use of said private key stored in said private key storing means; and communicating means for communicating with said exchange to transfer therebetween information obtained by enciphering or deciphering information for authentication on the basis of said public key held in said exchange and said private key stored in said personal station.
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12. A personal station authentication method in an exchange in a radio communication exchange system managing a closed service area and a plurality of personal stations, and comprising a cell station for communicating with each of said plurality of personal stations entering said closed service area by a radio line, an exchange connected to said cell station, and a public key management device for managing a predetermined public key in association with predetermined identification information of each of said plurality of personal stations, each of said plurality of personal stations storing a private key, said method comprising the steps of:
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requesting, when a personal station enters said closed service area, said public key management device for a public key corresponding to said identification information of said personal station thus entering; receiving said public key transmitted from said public key management device to said exchange; transferring information between said exchange and said entering personal station, which information is obtained by enciphering or deciphering information for authentication on the basis of said public key received by said exchange and said private key stored in said entering personal station; and 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 to authenticate said entering personal station.
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13. An authentication system for personal station authentication performed between a plurality of personal stations and at least one radio communication exchange system managing a respective closed service area, in which:
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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 authentication system includes 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 each of said plurality of personal stations, said radio communication system includes at least one cell station for communicating with each of said plurality of personal stations entering said closed service area by a radio line and an exchange connected to said cell station, and when a personal station enters said closed service area, said exchange transmits information for authentication to said personal station thus entering, said entering personal station performs an authentication operation on the basis of said private key stored in said entering personal station and transmits a result of said authentication operation to said exchange, and said exchange judges validity of the received result to authenticate registration of said entering personal station on the basis of consistency between said public key received by said exchange and said private key stored in said entering personal station. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 24)
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Specification