AUTHENTICATION SYSTEM AND AUTHENTICATION DEVICE
2 Assignments
0 Petitions
Accused Products
Abstract
An authentication system is provided with a server device for generating a random number used for authentication and check data obtained by encrypting the random number using an encryption key, an authentication device for authenticating a device to be authenticated by transmitting the random number transmitted from the server device to the device to be authenticated and comparing reply data transmitted from the device to be authenticated with check data transmitted from the server device, and the device to be authenticated for encrypting the random number transmitted from the authentication device using the encryption key and transmitting the encrypted random number as reply data.
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Citations
38 Claims
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1-19. -19. (canceled)
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20. An authentication system, comprising a device to be authenticated, an authentication device for authenticating the device to be authenticated, and a server device connected with the authentication device via a network,
wherein: -
the server device includes; a server-side encryption key storage for storing an encryption key for the authentication beforehand, a check data generating section for generating check data by encrypting specified authentication data used for the authentication by a preset encryption method using the encryption key stored in the server-side encryption key storage, a server-side communicating section for communicating with the authentication device via the network, and a server-side transmitting section for causing the server-side communicating section to transmit the authentication data to the authentication device; the authentication device includes; a first authenticating-side communicating section for communicating with the server device via the network, a second authenticating-side communicating section for communicating with the device to be authenticated, and an authenticating-side transmitting section for causing the second authenticating-side communicating section to transmit the authentication data received by the first authenticating-side communicating section to the device to be authenticated; the device to be authenticated includes; an authenticated-side encryption key storage for storing the encryption key beforehand, an authenticated-side communicating section for communicating with the authentication device, and an encrypting section for, if the authentication data is received from the second authenticating-side communicating section by the authenticated-side communicating section, encrypting the received authentication data by the encryption method using the encryption key stored in the authenticated-side encryption key storage; the authenticated-side communicating section transmits the data encrypted by the encrypting section as reply data to the second authenticating-side communicating section; and the authentication device further includes an authenticating section for authenticating the device to be authenticated based on the reply data received by the second authenticating-side communicating section and the check data generated by the check data generating section. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 36, 37, 38)
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33. An authentication device connected with a server device via a network for authenticating a device to be authenticated, comprising:
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a first authenticating-side communicating section for communicating with the server device via the network; a second authenticating-side communicating section for communicating with the device to be authenticated; an authenticating-side transmitting section for, if specified authentication data transmitted from the server device is received by the first authenticating-side communicating section, causing the second authenticating-side communicating section to transmit the received authentication data to the device to be authenticated; and an authenticating section for, if reply data obtained by encrypting the authentication data using preset encryption method and encryption key by the device to be authenticated is received by the second authenticating side communicating section, authenticating the device to be authenticated based on check data obtained by encrypting the authentication data using the encryption method and encryption key and the reply data received by the second authenticating-side communicating section. - View Dependent Claims (34, 35)
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Specification