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

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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ROCKSTAR BIDCO, LPMONTREAL QUEBEC1874

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Yunzhou Lowell, MA 23 326

Cited Art

Patent Info (Count) # Cites Year
 
SUN MICROSYSTEMS, INC. (3)
6,330,671 Method and system for secure distribution of cryptographic keys on multicast networks 55 1997
6,195,751 Efficient, secure multicasting with minimal knowledge 80 1998
6,295,361 Method and apparatus for multicast indication of group key change 91 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 36 1997
 
FUJITSU LIMITED (1)
6,215,877 Key management server, chat system terminal unit, chat system and recording medium 45 1998
 
LIFESIZE COMMUNICATIONS, INC. (1)
5,737,011 Infinitely expandable real-time video conferencing system 120 1995
 
SCIENTIFIC-ATLANTA, INC. (1)
5,359,601 Apparatus providing dynamic virtual service selection in a multi-service communications system 90 1993
 
THOMSON LICENSING (1)
5,642,153 Consumer interface for a digital television system 70 1994

Patent Citation Ranking

Forward Cites

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 3 2006
 
FRANCE TELECOM (1)
8,103,255 Method and a device for associating a terminal with a user account 0 2007
 
TOSHIBA SOLUTIONS CORPORATION (1)
8,200,977 Group signature system, device, and program 1 2010

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
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
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00