Complex document security
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 23, 1997
Grant Date -
N/A
app pub date -
Aug 28, 1995
filing date -
Dec 14, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and means to control the degree to which the presence of covert information may be reduced, eliminated or corrupted in documents created on a computer device (particularly complex documents) before the document is transmitted outside a secure environment in which the document is created. The process of handling a document in a secure environment comprises the preferred step of displaying the document or a predetermined portion thereof in a manner which conforms to the rule that no pixel of the display is written to more than once for the current portion of the document being displayed. Preferably the method includes the steps of creating a document, transforming the document into an intermediate form by defining the content and structure of the document using a predetermined set of document describers, applying the intermediate form of the document to at least one filter adapted to eliminate or corrupt the content and form of any covert information contained within the intermediate form of the document followed by the previously described step of displaying the document in the manner described above.
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