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Third party validation of internet protocol addresses

  • US 9,148,335 B2
  • Filed: 09/30/2008
  • Issued: 09/29/2015
  • Est. Priority Date: 09/30/2008
  • Status: Expired due to Fees
First Claim
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1. A method for enabling a third party validation of Internet Protocol (IP) addresses, comprising:

  • accessing a first network by a first node over a first communication interface;

    obtaining by the first node an IP address from the first network, wherein the IP address from the first network is valid and comprises a Prefix and an Interface Identifier;

    requesting by the first node a certification for the IP address from a trusted third party;

    receiving, by the first node, return-routability information that includes a cookie, sent from the trusted third party based on the Prefix, in response to requesting the certification for the IP address from the trusted third party;

    sending at least a subset of the return-routability information, including the cookie, by the first node to the trusted third party;

    receiving by the first node a validation ticket from the trusted third party that includes the certified IP address and a signature of the trusted third party, wherein;

    the validation ticket indicates whether at least one of the Prefix and the Interface Identifier is valid; and

    the trusted third party certifies the Prefix only in response to the subset of the return-routability information, including the cookie, sent by the first node to the trusted third party matching a corresponding subset of the return-routability information, including the cookie, received by the first node from the trusted third party;

    accessing a second network by the first node over a second communication interface; and

    transmitting the validation ticket by the first node to a second node in the second network over the second communication interface,wherein the second node verifies the IP address based on the signature of the trusted third party included in the transmitted validation ticket and, in response to a successful verification, the second node allows further communication with the first node over the second network.

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