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:
Jan. 02, 2018
Filed:
Feb. 26, 2016
International Business Machines Corporation, Armonk, NY (US);
Christian Mueller, Dichtelbach, DE;
Dominic Mueller-Wicke, Weilburg, DE;
Erik Rueger, Ockenheim, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer receives a set of objects from a client, whereby at least one of the objects of the set are respectively associated and encrypted with a unique file encryption key (FEK). The computer encrypts each of the FEKs with a common master encryption key, MEK, resulting in respective locked keys. In an initial backup, the encrypted objects together with their associated locked keys are transmitted to a backup server where a first module determines if locked key has changed via referencing an encryption state associated with the encrypted objects. If an MEK has changed, the existing FEKs are re-encrypted with the changed MEK to generate new locked keys, and, in a subsequent backup operation, sending the new locked keys to the backup server to replace the existing locked keys, while avoiding transmitting to the backup server the objects whose associated FEKs are affected by the changed MEK.