KEY MANAGEMENT DEVICE AND INFORMATION TRANSMISSION SYSTEM USING THE SAME
2 Assignments
0 Petitions
Accused Products
Abstract
An information transmission system includes a terminal device connected to a server device. Transmission destination information and transmission source information are encrypted and correlated with a user identifier when this information is stored in a storage unit for the server device. By using the user identifier and a decryption key which are reported when a transmission command button of the terminal device is pressed, the transmission destination information and the transmission source information are read out and decrypted by a decryption unit. A transmission unit for the server device transmits the transmission source information to a transmission destination specified by the transmission destination information.
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Citations
28 Claims
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1-14. -14. (canceled)
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15. An information transmission system in which a terminal device and a server device are connected, wherein:
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the terminal device comprises; a key generation unit that generates an encryption key and a decryption key; a terminal device memory unit that stores an user identification information for identifying the user owning the terminal device and stores the decryption key; an encryption processing unit that encrypts a transmission destination information containing an information related to the transmission destination and a transmission source information containing an information related to the user of the terminal device using the encryption key; a first terminal device transmission unit that transmits the encrypted transmission destination information and the encrypted transmission source information; an operation unit that has information input buttons containing a transmission command button; a terminal device control unit that generates a transmission command, and reads out the user identification information and the decryption key from the terminal device memory unit, when an occurrence of an emergency is notified from the operation unit; a second terminal device transmission unit that transmits the transmission command, the user identification information and the decryption key; and the server device comprises; a server device memory unit that stores the transmission destination information and the transmission source information received from the terminal device with correlating to the user identification information; a decryption unit that reads out the transmission destination information and the transmission source information from the server device memory unit, and decrypts the transmission destination information and the transmission source information using the decryption key, when receiving the transmission command, the user identification information and the decryption key from the terminal device; and a server device transmission unit that transmits the transmission source information to the transmission destination specified by the transmission destination information. - View Dependent Claims (16, 17, 18, 19)
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20. An information transmission method, comprising;
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a first step that the terminal device generates an encryption key and a decryption key; a second step that the terminal device stores an user identification information for identifying the user owning the terminal device and stores the decryption key to the internal terminal device memory unit; a third step that the terminal device encrypts a transmission destination information containing a information related to the transmission destination and a transmission source information containing a information related to the user of the terminal device using the encryption key; a fourth step that the terminal device transmits the encrypted transmission destination information and the encrypted transmission source information; a fifth step that the server device stores the transmission destination information and the transmission source information received from the terminal device with correlating to the user identification information; a sixth step that the terminal device generates a transmission command, and reads out the user identification information and the decryption key from the terminal device memory unit, when a state of emergency is notified from the operation unit; a seventh step that the terminal device transmits the transmission command, the user identification information and the decryption key to the server unit; a eighth step that the server device receives the transmission command, the user identification information and the decryption key, reads out the transmission destination information and the transmission source information related to the user identification information from the server device memory unit, and decrypts the transmission destination information and the transmission source information using the decryption key; and a ninth step that the server device transmits the transmission source information to the transmission destination specified by the transmission destination information. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification