Patent · US Active

Portable secure data files

US8364984B2 · kind B2 · utility

34Cited by

16References

19Claims

0Family size

Assignee

Microsoft Corporation · US

Inventors

Charles G. Jeffries · Sammamish, US
Vijay G. Bharadwaj · Sammamish, US
Michael Grass · Hanstedt, DE
Matthew C. Setzer · Somerset, US
Gaurav Sinha · Bengaluru, IN
Carl M. Ellison · Portland, US

Key dates

Filing date	Mar 13, 2009
Grant date	Jan 29, 2013
Priority date	—
Expiry date	May 20, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG06F2221/2151
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A portable secure data file includes an encrypted data portion and a metadata portion. When a request associated with a current user of a device to access a portable secure data file is received, one or more records in the metadata portion are accessed to determine whether the current user is permitted to access the file data in the encrypted data portion. If a record indicates the user is permitted to access the file data, a content encryption key in that record is used to decrypt the encrypted data portion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.