Copying machine with encryption function
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United States of America Patent
Stats
-
Apr 30, 1996
Grant Date -
N/A
app pub date -
Apr 21, 1995
filing date -
Oct 21, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Information is read from a medium such as paper in which information is written. The read information is enciphered. When encryption processing is performed, an encryption key is used. As the encryption key, an encryption key generated for each encryption is used, or an encryption key already generated is used again. The enciphered information is written into another medium such as paper. When decryption processing is performed, information is read from the medium in which the enciphered information is written. The read information is deciphered using as a decryption key the same key as the encryption key used when the encryption processing is performed. The deciphered information is written into another medium such as paper.
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