File security system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 30, 1993
Grant Date -
N/A
app pub date -
Jul 20, 1992
filing date -
Sep 26, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A file security system of such a constitution that after plaintext has been enciphered by data encryption key means the encryption key means per se is stored or made freely transmissible in the state further enciphered by the encrytion key maintained in secret and the information thus processed can be deciphered into plaintext information only by making good use of said encryption key means.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully