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:
Aug. 28, 2018
Filed:
Mar. 25, 2016
Emc Corporation, Hopkinton, MA (US);
Lifeng Yang, Beijing, CN;
Xinlei Xu, Beijing, CN;
Jian Gao, Beijing, CN;
Lili Chen, Hopkinton, MA (US);
Changyu Feng, Beijing, CN;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Techniques of protecting data involve storing a data structure in a data storage system that associates indices with respective keys. In this data structure, each index corresponds to a point in time when a respective key was put into effect. Each key may then be used to decrypt data stored in the data storage system that was encrypted during a time interval following the point in time when the respective key was put into effect, but before a later key was put into effect. During a key update process, a new key is put into effect and a new entry is created in the data structure that associates a new index with the new key.