Electronic transmission device, and signal transmission method

Information security – Prevention of unauthorized use of data including prevention... – Access control

Reexamination Certificate

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Details

C726S031000, C725S031000, C713S170000, C380S228000, C380S239000, C380S255000

Reexamination Certificate

active

07987515

ABSTRACT:
An electronic signal transmission apparatus executes an authentication process with a transmitting electronic device over a transmission line and receives an encrypted signal and first and second key information therefrom. The encrypted signal is decrypted based on the first key information, displayed and/or recorded, and re-encrypted using the second key information. The encrypted signal is transmitted to another electronic transmission apparatus if that apparatus does not have a recording capability and determined to be authorized using a second authentication process. The re-encrypted signal is sent to the another electronic transmission apparatus if that device has a recording capability and is authorized.

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Office Action from Japanese Application No. 2001-008249, dated Sep. 7, 2010.

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