| 摘要 |
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.
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