Decryption apparatus for use in encrypted communications
First Claim
1. A decryption apparatus for use in encrypted communications installed between a first communications apparatus and a second communications apparatus to transmit and receive encrypted packets therebetween and allowing a monitoring apparatus to monitor contents of the transmitted and received packets, comprising:
- a storage unit for storing first key information for decrypting a packet transmitted from the first communications apparatus and encrypting a packet to be transmitted thereto, second key information for decrypting a packet received from the second communications apparatus and encrypting a packet to be transmitted thereto, and an encryption algorithm using the first and the second key information;
a relay unit for decrypting a first packet received from the first communications apparatus by using the first key information and encrypting a decrypted first packet by using the second key information according to the encryption algorithm and then transmitting an encrypted first packet to the second communications apparatus, and decrypting a second packet received from the second communications apparatus by using the second key information and encrypting a decrypted second packet by using the first key information according to the encryption algorithm and then transmitting an encrypted second packet to the first communications; and
an output unit for standardizing a decrypted packet produced by the relay unit to provide the monitoring apparatus with a standardized decrypted packet of a form capable of being processed by the monitoring apparatus, thereby allowing the monitoring apparatus to monitor contents of the standardized decrypted packet.
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Accused Products
Abstract
A decryption apparatus for use in encrypted communications is installed between a first communications apparatus and a second communications apparatus to transmit and receive encrypted packets therebetween and allowing a monitoring apparatus to monitor contents of the transmitted and received packets. The decryption apparatus includes a storage unit, a relay unit and an output unit. The storage unit stores first key information, second key information, and an encryption algorithm using the first and the second key data. The relay unit decrypts a first and a second packet received from the first and the second communications apparatus by using the first and the second key information and encrypting a decrypted first and second packet by using the second and the first key information according to the encryption algorithm and then transmitting an encrypted first and the second packet to the second and the first communications apparatus.
95 Citations
9 Claims
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1. A decryption apparatus for use in encrypted communications installed between a first communications apparatus and a second communications apparatus to transmit and receive encrypted packets therebetween and allowing a monitoring apparatus to monitor contents of the transmitted and received packets, comprising:
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a storage unit for storing first key information for decrypting a packet transmitted from the first communications apparatus and encrypting a packet to be transmitted thereto, second key information for decrypting a packet received from the second communications apparatus and encrypting a packet to be transmitted thereto, and an encryption algorithm using the first and the second key information;
a relay unit for decrypting a first packet received from the first communications apparatus by using the first key information and encrypting a decrypted first packet by using the second key information according to the encryption algorithm and then transmitting an encrypted first packet to the second communications apparatus, and decrypting a second packet received from the second communications apparatus by using the second key information and encrypting a decrypted second packet by using the first key information according to the encryption algorithm and then transmitting an encrypted second packet to the first communications; and
an output unit for standardizing a decrypted packet produced by the relay unit to provide the monitoring apparatus with a standardized decrypted packet of a form capable of being processed by the monitoring apparatus, thereby allowing the monitoring apparatus to monitor contents of the standardized decrypted packet. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A decryption apparatus for use in encrypted communications, wherein the decryption apparatus intercepts encrypted packets transmitted and received between a first communications apparatus and a second communications apparatus through a relay apparatus installed on a communications path therebetween to have a monitoring apparatus monitor contents of the encrypted packets, comprising:
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a storage unit for storing first key information for decrypting a packet sent from the first communications apparatus to the second communications apparatus, second key information for decrypting a packet sent from the second communications apparatus to the first communications apparatus, and an encryption algorithm using the first and the second key information;
a decryption unit for decrypting the packet received from the first communications apparatus by using the first key information according to the encryption algorithm, and decrypting the packet received from the second communications apparatus by using the second key information according to the encryption algorithm; and
an output unit for standardizing a decrypted packet produced by the decryption unit to provide the monitoring apparatus with a standardized packet of a form capable of being processed by the monitoring apparatus, thereby allowing the monitoring apparatus to monitor contents of the standardized packet. - View Dependent Claims (8, 9)
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Specification