Network compromise recovery methods and apparatus

Details Network compromise recovery methods and apparatus Network compromise recovery methods and apparatus

2006-06-20

2006-06-20

Louis-Jacques, Jacques (Department: 2134)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Having particular address related cryptography

C380S273000, C380S279000, C380S284000

Reexamination Certificate

active

07065643

ABSTRACT:
A secure communications system (100, FIG.1) with a compromised communications node can quickly recover from the compromised condition by sending re-keying messages using a key encryption key hierarchy (200, FIG.2). Each communications node (330, FIG.3) includes a memory (300, FIG.3) with a list of tier-group specific key encryption keys, and whenever a message arrives that is encrypted with a key encryption key in the list, the communications node decrypts the message. When the message includes a new traffic encryption key, the communications node has been re-keyed. Key encryption keys are managed hierarchically such that many communications nodes can be re-keyed with very few broadcast messages, thereby saving communications resources.

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patent: 6684331 (2004-01-01), Srivastava
patent: 6735312 (2004-05-01), Abdalla et al.
patent: 6880081 (2005-04-01), Itkis

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