Digital dictation system with protection against unauthorized listening-in
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United States of America Patent
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Nov 10, 1998
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N/A
app pub date -
Aug 15, 1995
filing date -
Feb 26, 1993
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Abstract
In the present state of the art, digital dictation machines with interchangeable semiconductor stores in the form of chip cards are known. The present invention describes a dictation system consisting of a mobile and stationary dictation machines in which the unauthorized listening-into dictated items is prevented by a code lock. The special nature of the coding of the machine and the code exchange between the chip card and the dictation machine is disclosed in particular. The code for a given machine configuration is established from a central reproduction station.
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