| 摘要 |
PURPOSE: To provide the method and device for security communication which are provided with a security radio communication link between a mobile device and a base device. CONSTITUTION: A mobile device 100 transmits host authentication (Cert Mobile) to a base device 105 together with a call value (CH1) selected at random and a list of supported shared key algorithms (SKCS). The base device 105 discriminates whether the host authentication (Cert Mobile) is valid or not. If it is not valid, the base device 105 rejects the connection attempt. Next, the base device 105 transmits Cert Base, random numbers(RN1) enciphered by a public key of the mobile device 100, and an identifier for selected SKCD to the mobile device 100. The base device 105 preserves random numbers RN1, and the CH1 value and the selected SKCS are added to a message to be transmitted to the base device 105. The mobile device 100 verifies Cert Base, and if this authentication is valid, the mobile device 100 verifies the signature of the message under a public key (Pub Base) of the base device 105. |
