METHODS FOR ESTABLISHING A SECURITY SESSION IN A COMMUNICATIONS SYSTEM
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United States of America Patent
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N/A
Issued Date -
Feb 9, 2012
app pub date -
Jun 30, 2011
filing date -
Aug 5, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A security gateway and an initiating device perform methods for establishing a security session. The methods includes the security gateway: receiving a first message from an initiating device, the first message including a first message authentication code; validating the first message using the message authentication code; and responsive to the validating, sending a second message to the initiating device, the second message including a timestamp and further including a second message authentication code for authenticating of the timestamp by the initiating device, wherein the first and second messages are used to establish the security session, and the authenticated timestamp is used for subsequent replay protection of messages between the security gateway and the initiating device. The method further includes the security gateway validating a dynamically assigned IP address for the initiating device to use in authorizing VPN traffic between the two devices.
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