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Encryption key rekeying apparatus and method

  • US 20050047600A1
  • Filed: 08/29/2003
  • Published: 03/03/2005
  • Est. Priority Date: 08/29/2003
  • Status: Active Grant
First Claim
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1. A method comprising:

  • at a key management facility;

    receiving an encryption key rekeying request from a non-roaming communication unit;

    communicating to the non-roaming communication unit a rekeying message that includes a rekeying encryption key, wherein at least a portion of the rekeying encryption key is encrypted using an encryption scheme that is decypherable by the non-roaming communication unit;

    receiving an encryption key rekeying request from a roaming communication unit;

    communicating to the roaming communication unit a rekeying message that includes a rekeying encryption key, wherein at least a portion of the rekeying encryption key is encrypted as a function of an encryption scheme that is decypherable by the roaming communication unit.

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