Network compromise recovery methods and apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 20, 2006
Issued Date -
N/A
app pub date -
Mar 28, 2000
filing date -
Mar 28, 2000
priority date (Note) -
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status (Latency Note)
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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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