Method and apparatus for collaborative document control
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 28, 1998
Grant Date -
N/A
app pub date -
Oct 23, 1995
filing date -
Oct 23, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus are disclosed for controlling collaborative access to a work group document by the users of a computer system. A combination of public-key cryptographic methods, symmetric cryptographic methods, and message digest generation methods are used. The document has a data portion and a prefix portion. A computer-implemented collaborative encryption method uses structures in the prefix portion to restrict access to the information stored in the data portion. Users who are currently members of a collaborative group can readily access the information, while users who are not currently members of the group cannot. Other structures in the prefix portion support collaborative signatures, such that members of the group can digitally sign a particular version of the data portion. These collaborative signatures can then be used to identify the signing member and to determine if changes in the data portion were made after the collaborative signature was linked to the document.
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