Multi-level security systems

Details Multi-level security systems Multi-level security systems

2008-04-08

2008-04-08

Vu, Kim (Department: 2135)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Security kernel or utility

C726S002000

Reexamination Certificate

active

07356695

ABSTRACT:
Techniques are disclosed for improving multi-level security (“MLS”) in computing systems. Communication between MLS systems in the prior art requires explicitly tagging each packet with its security classification. The packet tags comprise variable-length bit patterns inserted into packet headers. This results in a number of drawbacks, including increased path length and code complexity, as well as reduced interoperability. An MLS system according to the present invention simulates a cluster or collection of single-level security systems, and thereby avoids packet tagging. For each security classification used by an MLS system, a distinct source address is defined. This source address is used for outbound packets having that security classification, such that the packet's source address implicitly identifies the packet's security classification.

REFERENCES:
patent: 6023765 (2000-02-01), Kuhn
patent: 6154839 (2000-11-01), Arrow et al.
patent: 6304973 (2001-10-01), Williams
patent: 6480963 (2002-11-01), Tachibana et al.
patent: 6879587 (2005-04-01), Yadav et al.
patent: 7114005 (2006-09-01), McDaniel
patent: 2003/0182431 (2003-09-01), Sturniolo et al.

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