US 8,479,301 B2 · Offline access in a document control system

Abstract

Systems and techniques to provide offline access in a document control system. In general, in one implementation, the technique includes: receiving a request from a client, and pre-authorizing the client, in response to the request, to allow actions by a user as a member of a group of users by sending to the client offline access information including a first key associated with the group, the first key being useable at the client to access an electronic document by decrypting a second key in the electronic document. Receiving a request can involve receiving a request from the client to take an action with respect to a second document. The technique can also include verifying the user at the client as an authenticated user, and the offline access information can include user-specific keys, group-specific keys, a policy, and a document revocation list.

Claims25

Dependent claims

A method comprising:

receiving a request from a client;
and
pre-authorizing the client, in response to the request, to allow actions by a user as a member of a group of users by sending to the client offline access information comprising a first key associated with the group, the first key being useable at the client to access an electronic document by decrypting a second key in the electronic document, wherein pre-authorizing the client comprises comparing a time of last record client-synchronization with a time of last chance in user-group information for the user.

Dependencies are inferred from the claim text.

Facts

Application

13/087,628Filed 15 Apr 2011 · continuation

Priority

31 Oct 2003

Published

US 2011/0191858 A14 Aug 2011

Granted

2 Jul 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

G06F 21/6209
Protecting access to data via a platform, e.g. using keys or access control rules: to a single file or object, e.g. in a secure envelope,…
G06Q 20/3674
Involving electronic purses or money safes: involving authentication
H04L 9/0833
Involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]: involving conference or group key
H04L 9/0891
Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords: revocation or update of secret…

Family

Application10/699,124Parent of this continuation · filed 31 Oct 2003

US 7,930,757 B2Parent of this continuation · filed 19 Apr 2011

US 2011/0191858 A1Pre-grant publication · published 4 Aug 2011

US 2005/0097061 A1Published application

US 8,479,301 B2This patent

From the US filing history. Foreign family members aren’t listed.

Offline access in a document control system

Life of this patent

Offline access in a document control system

Life of this patent

Abstract

Claims25