Secure key management for roaming protected content

US9853812B2 · kind B2 · utility

Assignee

• MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

• Yogesh A. Mehta · Bellevue, US
• Innokentiy Basmov · Redmond, US
• Octavian T. Ureche · Renton, US
• Peter Novotney · Seattle, US
• Preston Derek Adam · Woodinville, US
• Mugdha Lakhani · Cambridge, GB
• Saurav Sinha · Kirkland, US
• Narendra S. Acharya · Kirkland, US
• Karanbir Singh · Seattle, US

Key dates

• Filing date: Sep 17, 2014
• Grant date: Dec 26, 2017
• Expiry date: Sep 17, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W12/08
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Content on a device is encrypted and protected based on a data protection key corresponding to a particular identity of the user of the device. The protected content can then be stored to cloud storage, and from the cloud storage the protected content can be transferred to various other ones of the user's devices. A data protection key that is used to retrieve the plaintext content from the protected content is maintained by the user's device. This data protection key can be securely transferred to other of the user's devices, allowing any of the user's devices to access the protected content.