Communications systems firewall
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 11, 2011
Grant Date -
Aug 28, 2008
app pub date -
Sep 12, 2006
filing date -
Sep 13, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
Methods, apparatus, programs and signals for providing communications network security. The approach is based on using established “standard” protocols, but packets (or cells or frames) are deliberately malformed by the sender, optionally according to a predetermined rule (for example by inverting a packet check digit). A filter forwards only packets identified as being invalid, optionally in accordance with the rule; packets which are valid with respect to the “standard” protocol are dropped. The filter is preferably implemented in hardware to mitigate the risk of its being compromised by a malicious attack.
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