ENCRYPTION APPARATUS, ENCRYPTION METHOD, AND ENCRYPTION SYSTEM
First Claim
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1. An encryption apparatus, comprising:
- a plurality of ports to at least one of which a terminal having an encrypting capability can be directly or indirectly connected;
encryption/decryption means for performing an encrypting process and a decrypting process on data to terminate encryption-based security between the terminal having the encrypting capability; and
bridge means for allowing data, which has been received with one of the plurality of ports and then on which the encrypting or decrypting process has been performed, to be outputted as it is from another port without being performed any routing process.
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Abstract
An encryption apparatus 1 for performing an encrypting process and an encrypted data decrypting process is mounted to terminate the security by encryption between personal computers 7 to 9 on which encryption software is installed. For example, by connecting the apparatus between terminals 2 to 4 and the personal computers 7 to 9, the encryption can be used in an in-house LAN having the terminals 2 to 4 on which encryption software cannot be installed. Thus, a secure network 10 almost free of the risk of tapping of the confidential information in the LAN by an external unauthorized entry or attach can be successfully designed.
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Citations
8 Claims
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1. An encryption apparatus, comprising:
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a plurality of ports to at least one of which a terminal having an encrypting capability can be directly or indirectly connected;
encryption/decryption means for performing an encrypting process and a decrypting process on data to terminate encryption-based security between the terminal having the encrypting capability; and
bridge means for allowing data, which has been received with one of the plurality of ports and then on which the encrypting or decrypting process has been performed, to be outputted as it is from another port without being performed any routing process. - View Dependent Claims (2, 6, 7, 8)
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3. An encryption apparatus, comprising:
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a plurality of ports to at least one of which a terminal having an encrypting capability can be directly or indirectly connected;
encryption/decryption means for performing an encrypting process or a decrypting process on data which has been received with one of the plurality of ports and then has passed through a physical layer and a data link layer; and
bridge means for passing the encrypted or decrypted data to the data link layer and the physical layer without passing said data to a network layer in which routing between networks is controlled, and then sending said data to another port so as to be outputted from said port. - View Dependent Claims (4)
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5. An encrypting method for performing an encrypting process and a decrypting process using an encryption apparatus, the apparatus having a plurality of ports to at least one of which a terminal having an encrypting capability can be directly or indirectly connected, the method comprising the steps of:
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performing the encrypting or decrypting process on data which has been received with one of the plurality of ports and then has passed through a data link layer and a physical layer; and
outputting the encrypted or decrypted data from another port through the data link layer and the physical layer, without passing said data to a network layer in which routing between networks is controlled.
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Specification