06889321 is referenced by 92 patents and cites 252 patents.

Communication information transmitted in the broadband communication system may be in a packet format and secured using encryption techniques, for example encryption software, including a means for providing an initial security key and updated security keys to the various pieces of communication equipment located throughout the broadband communication system. When communication equipment, for example a gateway, is first registered with, for example, an IP central station, the IP central station assigns an initial encryption key to the gateway that is assigned and retained by a server, for example a call manager server, and the gateway (e.g., broadband residential gateway. This initial encryption key may be used to establish a secure two way communication between two pieces of communication equipment as an originating point communication equipment and a terminating point communication equipment.

Title
Protected IP telephony calls using encryption
Application Number
9/475661
Publication Number
6889321 (B1)
Application Date
December 30, 1999
Publication Date
May 3, 2005
Inventor
Spencer Wang
Parsippany
NJ, US
Hopeton Walker
Haledon
NJ, US
Jesse Eugene Russell
Piscataway
NJ, US
Fen Chung Kung
Bridgewater
NJ, US
Assignee
AT&T
NY, US
IPC
H04N 007/167
H04L 009/00
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