File system filter authentication

US8443207B2 · kind B2 · utility

Assignee

• Sandisk Technologies, Inc. · US

Inventors

• Mei Yan · Cupertino, US
• Chieh-Hao Yang · Sunnyvale, US
• Junzhi Wang · Longbeilingcun, CN
• Paul McAvoy · San Francisco, US
• Bahman Qawami · Los Altos, US
• Farshid Sabet-Sharghi · Los Altos Hills, US
• Patricia Dwyer · Redwood City, US
• Po Yuan · Renton, US

Key dates

• Filing date: Mar 18, 2010
• Grant date: May 14, 2013
• Expiry date: Mar 20, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2209/603
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A method of accessing content includes installing a file system filter for a secure removable memory device on a host device. A challenge is sent from the file system filter to a software entity on the host device, and a software entity response is received at the file system filter in response to the challenge. A file system filter response is calculated at the file system filter using the challenge, and access to first content on the secure removable memory device is provided if the software entity response matches the file system filter response.