Method for sending messages over secure mobile communication links

  • US 7,346,926 B2
  • Filed: 01/21/2003
  • Issued: 03/18/2008
  • Est. Priority Date: 01/22/2002
  • Status: Active Grant
First Claim
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1. A method for sending messages over secure communication links in networks, comprising:

  • providing at least a first terminal in communication with a second terminal,establishing a first secure communication link between an initial network address of the first terminal and a network address of the second terminal,the first terminal performing encapsulation of messages sent in the first secure communication link using a first encapsulation method,the first terminal moving from the initial network address to a new network address,the first terminal sending an encapsulated request message, using the first encapsulation method, to the second terminal to change communication between the first terminal and the second terminal from the first secure communication link to a second secure communication link extending between the new network address of the first terminal and the network address of the second terminal, the encapsulated request message containing a description of the first encapsulation method performed by the first terminal,the second terminal receiving the encapsulated request message,the second terminal using the description of the first encapsulation method to detect translations of the encapsulated request message performed by intermediate computers disposed en route between the first terminal and the second terminal,the second terminal responding to the first terminal with a reply message, the reply message having a description about detected translations made by intermediate computers disposed between the new network address of the first terminal and the network address of the second terminal and/or encapsulation methods supported by the second terminal,the first terminal receiving the reply message and the description about translation made by intermediate computers and encapsulation methods supported by the second terminal, the first terminal selecting an encapsulation method to encapsulate a message based on the description of the reply message, andthe first terminal sending the encapsulated message to the second terminal.

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