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Northrop Grumman Systems Assigned Patent

Multi-level security system for secure file sharing across multiple security levels

Northrop Grumman Systems Corporation, Falls Church, VA, has been assigned a patent (9,489,534) developed by Hashii, Brant D., Long Beach, CA, Scott, Mark O., Escondido, CA, Silverman, Daniel R., Hermosa Beach, CA, Wixtrom, Lee, La Palma, CA, Tester, Jonathan, Encinitas, CA, and Brown, Steve A., Los Angeles, CA, for a “multi-level security system for enabling secure file sharing across multiple security levels and method thereof.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A multi-level security system includes a storage medium partitionable into a plurality of partitions, a file system coupleable to the plurality of partitions, and a plurality of enclaves. Each enclave is assigned a security classification level. Each enclave resides in a different storage partition of the storage medium. Data stored on the storage medium is cryptographically separated at rest on a per-enclave basis. Cryptographic separation occurs at the disk block level, allowing individual blocks to be read and decrypted. The system also includes a reference monitor that enforces a system security policy that governs access to information between the enclaves. The reference monitor allows an enclave having a first classification level to securely read-down to an enclave having a second classification level lower than the first classification level and to write to another enclave having the first classification level.

The patent application was filed on October 23, 2014 (14/522,447).

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