Cipher key setting system, access point, and cipher key setting method
First Claim
1. A cipher key setting system that sets a cipher system and a cipher key used for enciphering prior to communication wireless communication data exchanged by wireless between a wireless LAN access point and a terminal with a wireless LAN interfacing device, wherein:
- the terminal comprises;
a cipher system transmitting means on the terminal side that transmits to the access point by wireless cipher systems that the terminal can adapt itself to, and a cipher system selecting means on the terminal side that detects a cipher system adopted by the access point and selects the detected cipher system; and
the access point comprises;
a connected terminal detecting means that specifies terminals participating in a wireless LAN and detects whether there are any variations in the terminals participating therein, and a cipher system selecting means on the access point side that, when the connected terminal detecting means detects that there have been variations in the terminals participating in the wireless LAN, adopts to select a specified cipher system according to a predetermined criterion among the cipher systems that the access point can adapt itself to and the terminals participating in the wireless LAN can commonly adapt themselves to.
1 Assignment
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Accused Products
Abstract
Disclosed is a cipher key setting system wherein the access point detects the terminals connected to the wireless LAN through the access point itself repeatedly at each predetermined time, reviews the adopted cipher systems when there are replacements of the terminals participating in the wireless LAN and a decrease in the number of the terminals, and adopts a cipher system according to the guideline ‘selecting the cipher system of the highest security level among the cipher systems that the devices building up the network can commonly adopt’. The system prevents the security setting from being maintained at a needlessly low level, after a certain terminal withdrew from the network or after some terminals were replaced.
39 Citations
11 Claims
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1. A cipher key setting system that sets a cipher system and a cipher key used for enciphering prior to communication wireless communication data exchanged by wireless between a wireless LAN access point and a terminal with a wireless LAN interfacing device, wherein:
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the terminal comprises;
a cipher system transmitting means on the terminal side that transmits to the access point by wireless cipher systems that the terminal can adapt itself to, and a cipher system selecting means on the terminal side that detects a cipher system adopted by the access point and selects the detected cipher system; and
the access point comprises;
a connected terminal detecting means that specifies terminals participating in a wireless LAN and detects whether there are any variations in the terminals participating therein, and a cipher system selecting means on the access point side that, when the connected terminal detecting means detects that there have been variations in the terminals participating in the wireless LAN, adopts to select a specified cipher system according to a predetermined criterion among the cipher systems that the access point can adapt itself to and the terminals participating in the wireless LAN can commonly adapt themselves to. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless LAN access point that adapts itself to a plurality of cipher systems in the wireless LAN communication, comprising:
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for setting a cipher system and a cipher key used in enciphering communication data prior to performing wireless communications with a terminal provided with a wireless LAN interfacing device, a connected terminal detecting means that specifies terminals participating in a wireless LAN and detects whether there are any variations in the terminals participating therein, and a cipher system selecting means on the access point side that, when the connected terminal detecting means detects that there have been variations in the terminals participating in the wireless LAN, adopts to select a specified cipher system according to a predetermined criterion on the basis of data relating to the cipher systems transmitted in advance by wireless from a plurality of terminals that the terminals can adapt themselves to, among the cipher systems that the access point can adapt itself to and the terminals participating in the wireless LAN can commonly adapt themselves to.
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11. A cipher key setting method that sets a cipher system and a cipher key used for enciphering prior to communication wireless communication data exchanged by wireless between a wireless LAN access point and a terminal with a wireless LAN interfacing device, wherein:
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the terminal transmits to the access point by wireless cipher systems that the terminal can adapt itself to, the access point specifies terminals participating in a wireless LAN through the access point and detects whether there are any variations in the terminals participating therein, and when detecting that there have been variations in the terminals participating in the wireless LAN, adopts to select a specified cipher system according to a predetermined criterion among the cipher systems that the access point can adapt itself to and the terminals participating in the wireless LAN can commonly adapt themselves to, and the terminal detects the cipher system adopted by the access point and selects the detected cipher system.
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Specification