Data operations using a proxy encryption key

US10484352B2 · kind B2 · utility

Assignee

• MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

• Mitica Manu · Sammamish, US
• Baskar Sridharan · Sammamish, US
• Raghunath Ramakrishnan · Madison, US
• Sriram K. Rajamani · Bengaluru, IN
• Victor Boyko · Brooklyn, US
• Pushkar Vijay Chitnis · Bellevue, US
• Shastry M. C. Shankara · Bengaluru, IN
• Ramarathnam Venkatesan · Redmond, US

Key dates

• Filing date: Jun 7, 2017
• Grant date: Nov 19, 2019
• Expiry date: Dec 13, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L63/0884
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Operating upon encrypted data with a particular data scope. A base encryption key is established and associated with the particular data scope, and then stored in a base encryption key store. That base encryption key store might be managed by an application or service that stores base encryption keys for multiple data scopes. A proxy encryption key acts as a kind of proxy for the base encryption key. The proxy encryption key may be used for frequent operations on encrypted data within the particular data scope. Thus, the principles described herein act as a frequency amplifier that allows key-based operations upon the particular data scope to be performed at much higher frequencies than otherwise would be possible by operating directly using the base encryption key.