Protecting against distributed denial of service attacks

Information security – Access control or authentication – Network

Reexamination Certificate

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Details

C709S224000, C713S161000

Reexamination Certificate

active

10232993

ABSTRACT:
A method for authenticating packet communication traffic includes receiving a data packet sent over a network from a source address to a destination address and reading from the packet a value of a field that is indicative of a number of hops traversed by the packet since having been sent from the source address. The authenticity of the source address is assessed responsive to the value.

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U.S. Appl. No. 09/929,877, filed Aug. 14, 2001, entitled “Method and apparatus for protecting against overload conditions on nodes of a distributed network”.
U.S. Appl. No. 60/316,198, filed Aug. 30, 2001, entitled “Method and apparatus for protecting against spoofed packet-based distributed denial of service attacks”.

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