Data handling in IPSec enabled network stack

Details Data handling in IPSec enabled network stack Data handling in IPSec enabled network stack

2007-07-10

2007-07-10

Sheikh, Ayaz (Department: 2131)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

C713S153000, C713S160000, C726S014000, C726S015000, C380S200000

Reexamination Certificate

active

09903612

ABSTRACT:
A method for providing cryptographic functions to data packets at the PPP layer of a network stack is presented. The method includes the steps of intercepting PPP datagrams having at least one encapsulated IP packet en route along the protocol stack; decapsulating the PPP datagrams to retrieve the encapsulated IP packet, determining whether to process the IP packet by modifying the IP packet to provide the cryptographic functions, and encapsulating the IP packet for transmission to a next layer of the network stack.

REFERENCES:
patent: 6438612 (2002-08-01), Ylonen et al.
patent: 6708218 (2004-03-01), Ellington et al.
patent: 2002/0184487 (2002-12-01), Badamo et al.
patent: 2004/0054794 (2004-03-01), Lantto et al.
J. Postel. “Internet Protocol”, RFC 791, Sep. 1, 1981, The Internet Society. http://www.ietf.org/rfc/rfc0791.txt?number=791 Sections 1-3.2.
Kent, S. et al., “Security Architecture for the Internet Protocol,” RFC 2401, Nov. 1998, The Internet Society.

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