Method and apparatus for transition of encryption key during an ongoing media communication session
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United States of America Patent
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May 4, 2010
Grant Date -
Dec 15, 2005
app pub date -
May 27, 2004
filing date -
May 27, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The disclosed embodiments provide for methods and apparatus for encrypting media using a current media encryption key (MEK), requesting a new MEK, and receiving the new MEK. The method further provides for transitioning from the current MEK to the new MEK and continuing to encrypt the media using the new MEK. In another embodiment, the method provides for decrypting media during an ongoing media communication session, the method provides for receiving encrypted media, and decrypting the encrypted media using a current MEK. The method further provides for requesting a new MEK before the current MEK expires based on its associated expiration time, receiving the new MEK, and continuing to decrypt the encrypted media based on a received MEK indication flag (MIF) that indicates whether the encrypted media is encrypted using the current MEK or the new MEK.
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