System and method for transmitting and receiving secret information, and wireless local communication device using the same
First Claim
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1. A system for transmitting and receiving secret information, comprising:
- at least one device to generate a ciphertext using public key information that is received over a location-limited channel; and
a wireless local communication device to transmit the public key information to the device over the location-limited channel and to decrypt the ciphertext generated at the device.
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Accused Products
Abstract
A system and method for transmitting and receiving secret information, a device using the same, and a wireless local communication device. The system for transmitting and receiving secret information includes at least one device to generate a ciphertext using public key information that is received over a location-limited channel; and a wireless local communication device to transmit the public key information to the device over the location-limited channel and to decrypt the ciphertext generated at the device. Thus, the secret information can be securely transmitted and received between devices regardless of reliability of the transmission channel.
16 Citations
21 Claims
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1. A system for transmitting and receiving secret information, comprising:
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at least one device to generate a ciphertext using public key information that is received over a location-limited channel; and
a wireless local communication device to transmit the public key information to the device over the location-limited channel and to decrypt the ciphertext generated at the device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for transmitting and receiving secret information between a device and a wireless local communication device over a location-limited channel, the method comprising:
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transmitting public key information from the wireless local communication device to the device;
generating, at the device, a ciphertext using the public key information and transmitting the generated ciphertext to the wireless local communication device; and
decrypting the received ciphertext at the wireless local communication device. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A device, comprising:
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a wireless communication module to receive public key information over a location-limited channel; and
an encryption module to generate a ciphertext using the public key information received via the wireless communication module. - View Dependent Claims (14)
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15. A wireless local communication device, comprising:
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a wireless communication module to transmit public key information over a location-limited channel and receive a ciphertext that is encrypted with the public key information; and
a decryption module to decrypts the received ciphertext. - View Dependent Claims (16)
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17. A method of receiving control data, comprising:
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generating a cipher text using a public key received over a location-limited channel; and
decrypting encrypted control data received over the channel using the cipher text.
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18. A method of sending control data, comprising:
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sending a public key over a location-limited channel;
sending, over the channel, the control data encrypted with a received cipher text generated using the public key.
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19. A control data transmission method, comprising:
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sending a public key over a location-limited channel by a control device;
generating a cipher text by a controlled device using the public key;
sending the cipher text over the channel;
encrypting of the control data by the control device using the cipher text;
sending the encrypted control data over the channel; and
decrypting the control data by the controlled device using the cipher text. - View Dependent Claims (20)
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21. A control data transmission system, comprising:
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a location-limited channel;
a control device sending a public key over the channel; and
a controlled device receiving the public key over the channel, generating a cipher text using the public key and sending the cipher text over the channel, and wherein the control device encrypting of the control data using the cipher text and sending the encrypted control data over the channel, and the controlled device decrypting the control data using the cipher text.
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Specification