Communication terminal using a temporary network key for assembling a secure communication frame
First Claim
Patent Images
1. A communication terminal comprising:
- a receiver for receiving a communication frame from another communication terminal over a telecommunications network;
a long-time key acquirer for obtaining a master network key and a key identification of the master network key from the communication frame;
a long-time key manager for managing the master network key;
a key identification manager for managing the key identification;
a short-time key acquirer for using the master network key and the key identification to generate a temporary network key;
a communication frame assembler for using the temporary network key to perform security processing on the communication frame, and inserting the key identification into the communication frame to assemble a secure communication frame; and
a transmitter for sending the secure communication frame to another communication device.
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Abstract
A communication terminal generates a temporary network key based on a managed master network key and on key identification used for security processing on a communication frame. The security processing is performed on the communication frame using the temporary network key. A secure communication frame is produced in which the identification of the key is indicated.
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Citations
17 Claims
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1. A communication terminal comprising:
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a receiver for receiving a communication frame from another communication terminal over a telecommunications network; a long-time key acquirer for obtaining a master network key and a key identification of the master network key from the communication frame; a long-time key manager for managing the master network key; a key identification manager for managing the key identification; a short-time key acquirer for using the master network key and the key identification to generate a temporary network key; a communication frame assembler for using the temporary network key to perform security processing on the communication frame, and inserting the key identification into the communication frame to assemble a secure communication frame; and a transmitter for sending the secure communication frame to another communication device. - View Dependent Claims (2, 3)
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4. A communication terminal comprising:
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a long-time key manager for managing a master network key; a receiver for receiving a secure communication frame from another communication terminal over a telecommunications network; a key identification acquirer for obtaining a key identification from the secure communication frame; a short-time key acquirer for using the key identification and the master network key to generate a temporary network key; and a communication frame acquirer for using the temporary network key to perform security processing on the secure communication frame to obtain a communication frame. - View Dependent Claims (5, 6)
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7. A communication terminal comprising:
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a long-time key manager for managing a master network key; a key identification manager for managing a key identification of keys; a short-time key acquirer for using the master network key and the key identification to generate a temporary network key; a communication frame assembler for using the temporary network key to perform security processing, and inserting the key identification to assembling a secure communication frame; a transmitter for sending the secure communication frame to another communication terminal; a receiver for receiving the secure communication frame from the other communication terminal over a telecommunications network; a key identification acquirer for obtaining a key identification from the secure communication frame; and a communication frame acquirer for using the temporary network key to perform security processing on the received secure communication frame to obtain a communication frame. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A secure communication system for encrypting and authenticating a communication frame by utilizing a key shared across a telecommunications network, said secure communication system comprising a plurality of communication terminals, each of said plurality of communication terminals comprising:
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a receiver for receiving a communication frame from another of the plurality of communication terminals over the telecommunications network; a long-time key acquirer for obtaining a master network key and a key identification of the master network key from the communication frame; a long-time key manager for managing the master network key; a key identification manager for managing the key identification; a short-time key acquirer for using the master network key and the key identification to generate a temporary network key; a communication frame assembler for using the temporary network key to perform security processing on the communication frame, and inserting the key identification into the communication frame to assemble a secure communication frame; and a transmitter for sending the secure communication frame to another communication device.
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16. A secure communication system for encrypting and authenticating a communication frame by utilizing a key shared across a telecommunications network, said secure communication system comprising a plurality of communication terminals, each of said plurality of communication terminals comprising:
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a long-time key manager for managing a master network key; a receiver for receiving a secure communication frame from another of the plurality of communication terminals over the telecommunications network; a key identification acquirer for obtaining a key identification from the secure communication frame; a short-time key acquirer for using the key identification and the master network key to generate a temporary network key; and a communication frame acquirer for using the temporary network key to perform security processing on the secure communication frame to obtain a communication frame.
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17. A secure communication system for encrypting and authenticating a communication frame by utilizing a key shared across a telecommunications network, said secure communication system comprising a plurality of communication terminals, each of said plurality of communication terminals comprising:
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a long-time key manager for managing a master network key; a key identification manager for managing a key identification of keys; a short-time key acquirer for using the master network key and the key identification to generate a temporary network key; a communication frame assembler for using the temporary network key to perform security processing, and inserting the key identification to assembling a secure communication frame; a transmitter for sending the secure communication frame to another of the plurality of communication terminals; a receiver for receiving the secure communication frame from the other communication terminal over the telecommunications network; a key identification acquirer for obtaining a key identification from the secure communication frame; and a communication frame acquirer for using the temporary network key to perform security processing on the received secure communication frame to obtain a communication frame.
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Specification