The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 2012
Filed:
Sep. 22, 2008
Miguel Oom Temudo DE Castro, Cambridge, GB;
Atul Adya, Redmond, WA (US);
John R. Douceur, Bellevue, WA (US);
William J. Bolosky, Issaquah, WA (US);
Miguel Oom Temudo de Castro, Cambridge, GB;
Atul Adya, Redmond, WA (US);
John R. Douceur, Bellevue, WA (US);
William J. Bolosky, Issaquah, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Systems and methods for secure file writes after a catastrophic event are allowed over an unauthenticated channel in a serverless distributed file system if an authenticator accompanies the secure file writes. The authenticator can be a power-of-attorney certificate with time limitations, a vector of message authenticated code, or a single message authenticator with secured with a secret shared among members of the serverless distributed file system. The serverless distributed file system includes at least 3f+1 participating computer members, with f representing a number of faults tolerable by the system. The group requires at least one authenticator for file creation and file uploads. Any changes to files stored among the members can be made over an unauthenticated channel if the file changes are secured by the authenticator and the group is able to verify the authenticator.