A key protected data stream and an encryption key are received at a gateway device. The gateway devices unprotects the data stream based upon the encryption key. The unprotected received data is modified by the gateway to generate a modified data. The modified data is protected based upon the encryption key to generate a key protected modified data. The gateway then transmits the key protected modified data to one or more clients along with the encryption key.

 
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> Wireless network with a cipher key change procedure

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