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Approaches for switching transport protocol connection keys

  • US 7,706,381 B2
  • Filed: 01/10/2006
  • Issued: 04/27/2010
  • Est. Priority Date: 01/10/2006
  • Status: Active Grant
First Claim
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1. A method of switching transport protocol connection keys, the method comprising the computer-implemented steps of:

  • within one communication session;

    a first computer network node sending a keychange request message from the first network node to a second node, wherein said keychange request message causes the second node to accept, from the first computer network node, subsequent non-confirmed first-key messages that are digitally signed with a first key and subsequent non-confirmed second-key messages that are digitally signed with a second key;

    wherein the second key is a next key in a pre-provisioned list of keys for the first and second nodes and a message digitally signed with a particular key from the pre-provisioned list of keys can be accepted using only the particular key;

    the first computer network node receiving a first response message from the second node acknowledging the receipt of the keychange request message;

    based on the first response message, the first computer network node accepting, from the second node, the subsequent non-confirmed first-key messages digitally signed with the first key and the subsequent non-confirmed second-key messages digitally signed with the second key;

    the first computer network node receiving a first subsequent message digitally signed with the second key from the second node;

    the first computer network node determining that there are no remaining non-confirmed first-key messages to be received digitally signed with the first key, and in response thereto, only accepting second-key messages digitally signed with the second key from the second node and sending a second subsequent message digitally signed with the second key to the second node, wherein said second subsequent message causes the second node to accept only the second-key messages digitally signed with the second key.

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