Encryption apparatus for enabling encryption and non-encryption terminals to be connected on the same network
First Claim
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1. A method for use in an encryption apparatus, said method comprising:
- receiving service type information from a network signifying whether a sending device is a non-encryption device or an encryption device;
converting the received service type information when such information signifies an encryption device to service type information signifying a non-encryption device; and
preventing data communication with the sending device when the received service type information signifies a non-encryption device.
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Abstract
An encryption apparatus enables encrypted communications using existing network equipment which does not have an encryption function, such as a server, a client, or a router. The encryption apparatus is connected to a section between a terminal and a network, data from the terminal is encrypted and sent to the network, data from the network is decrypted and sent to the terminal, and a connection control frame between the terminal and the network is not encrypted.
37 Citations
35 Claims
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1. A method for use in an encryption apparatus, said method comprising:
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receiving service type information from a network signifying whether a sending device is a non-encryption device or an encryption device; converting the received service type information when such information signifies an encryption device to service type information signifying a non-encryption device; and preventing data communication with the sending device when the received service type information signifies a non-encryption device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for use in an encryption apparatus, said method comprising:
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storing at least one non-encryption address in a transparent processing table corresponding to a device which is not capable of decryption; receiving a control frame, including address and service type information, from a service requesting device via a network connection; comparing the address information of the control frame with entries in the transparent processing table; selectively changing the service type information of the control frame when said comparing step indicates that the address information of the control frame does not match entries in the transparent processing table; and determining whether to encrypt data for transmission to said service requesting device based on the service type information output by said selective changing step. - View Dependent Claims (12, 13)
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14. A method for use in an encryption apparatus, said method comprising:
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receiving server information from a connected device signifying a hop number for the connected device; incrementing the hop number for the connected device; and transmitting the incremented hop number to a remote device via a network connection; wherein, based on the incremented hop number, a service requesting device without decryption capability avoids selecting the connected device. - View Dependent Claims (15, 16)
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17. An apparatus for implementing an encryption scheme, said apparatus comprising:
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a network side receiving section for receiving service type information from a network signifying whether a sending device is a non-encryption device or an encryption device; conversion means for converting the received service type information when such information signifies an encryption device to service type information signifying a non-encryption device; and means for preventing data communication with the sending device when the received service type information signifies a non-encryption device. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus for implementing an encryption scheme, said apparatus comprising:
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a transparent processing table storing at least one non-encryption address corresponding to a device which is not capable of decryption; a network side receiving section for receiving a control frame, including address and service type information, from a service requesting device via a network connection; a processing section for comparing the address information of the received control frame with entries in said transparent processing table and selectively changing the service type information of the control frame when the address information of the control frame does not match entries in said transparent processing table; and encryption means for selectively encrypting data for transmission to said service requesting device based on the service type information output by said processing section. - View Dependent Claims (29, 30, 31)
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32. An apparatus for implementing an encryption scheme, said apparatus comprising:
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a processing section for receiving server information from a connected device signifying a hop number for the connected device and incrementing the hop number for the connected device; and a network side transmitting section for transmitting the incremented hop number to a remote device via a network connection; wherein, based on the incremented hop number, a service requesting device without decryption capability avoids selecting the connected device. - View Dependent Claims (33, 34, 35)
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Specification