US Patent No: 7,269,728

Number of patents in Portfolio can not be more than 2000

Apparatus and method for distributing management keys in a multicast domain

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Abstract

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A method and apparatus for distributing keys in a multicast domain is provided. In a secure multicast domain, a request to join a multicast group for a time period occurs. A key distributor which controls access to the multicast data group determines if the request will be accepted. If the request is accepted the key distributor assigns the member to a virtual channel, wherein each virtual channel is defined by a time period. A data group key is forwarded to the member as is a virtual channel key. The member can then receive and decode events from the data group on the assigned virtual channel.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CONSTELLATION TECHNOLOGIES LLCPLANO, TX429

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Yunzhou Lowell, MA 25 419

Cited Art Landscape

Patent Info (Count) # Cites Year
 
SUN MICROSYSTEMS, INC. (3)
* 6,330,671 Method and system for secure distribution of cryptographic keys on multicast networks 59 1997
* 6,195,751 Efficient, secure multicasting with minimal knowledge 90 1998
* 6,295,361 Method and apparatus for multicast indication of group key change 104 1998
 
AT&T Bell Laboratories (1)
* 5,150,358 Serving constant bit rate traffic in a broadband data switch 92 1990
 
AT&T CORP. (1)
* 6,073,235 Private broadcast communication system and method for private broadcast communication over a wired or wireless network 37 1997
 
FUJITSU LIMITED (1)
* 6,215,877 Key management server, chat system terminal unit, chat system and recording medium 51 1998
 
LIFESIZE COMMUNICATIONS, INC. (1)
* 5,737,011 Infinitely expandable real-time video conferencing system 182 1995
 
SCIENTIFIC-ATLANTA, INC. (1)
* 5,359,601 Apparatus providing dynamic virtual service selection in a multi-service communications system 119 1993
 
THOMSON LICENSING (1)
* 5,642,153 Consumer interface for a digital television system 97 1994
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
SAMSUNG ELECTRONICS CO., LTD. (2)
* 7,835,525 Cryptographic method using dual encryption keys and a wireless local area network (LAN) system therefor 0 2003
* 8,374,353 Method and apparatus for updating a group key 0 2007
 
Brandenburgishe Technishe Universitat Cottbus (1)
* 7,957,320 Method for changing a group key in a group of network elements in a network system 6 2006
 
CISCO TECHNOLOGY, INC. (1)
* 8,750,507 Dynamic group creation for managed key servers 0 2010
 
FRANCE TELECOM (1)
* 8,103,255 Method and a device for associating a terminal with a user account 0 2007
 
INTEL CORPORATION (1)
8,819,306 General input/output architecture with PCI express protocol with credit-based flow control 0 2012
 
TOSHIBA SOLUTIONS CORPORATION (1)
* 8,200,977 Group signature system, device, and program 1 2010
* Cited By Examiner

Maintenance Fees

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7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 11, 2015
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 11, 2019
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