Method and apparatus for extending secure communication operatio

Details Method and apparatus for extending secure communication operatio Method and apparatus for extending secure communication operatio

1998-01-27

2000-07-18

Peeso, Thomas R.

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

713155, 713158, 713168, 380231, 380241, 380278, H04L 900

Patent

active

06092201&

ABSTRACT:
A method and apparatus for extending secure communication operations via shared lists is accomplished by creating a shared list in accordance with authorization parameters by one user and subsequently accessing the shared list via the authorization parameters by this and other users. To create the list, a user within the secured communication system determines whether it has been enabled, or authorized, to create a shared list. If so, the user identifies at least one other user to be added to the shared list. Having identified another user, the user creating the shared list verifies that the secure communication parameters (which includes a public key certificate of an end-user or of a certification authority) it has received regarding the another user is trustworthy. If the secure communication parameters are identified as trustworthy, the secure communication parameters of the another user are added to the shared list. To authenticate the shared list, the user creating the list digitally signs it. Once the shared list is created, other users, if authorized, may access the shared list to obtain certificates (e.g., encryption and/or signature verification certificates) of the users contained in the list.

REFERENCES:
Schneier, "Applied Cryptography", pp. 35, 37, 185, 186, 1995.

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