Cryptography – Communication system using cryptography – Circuit switched network
Reexamination Certificate
2004-11-02
2009-08-04
Sing, Simon (Department: 2614)
Cryptography
Communication system using cryptography
Circuit switched network
C380S278000, C370S355000, C370S356000, C370S352000, C370S252000, C370S401000
Reexamination Certificate
active
07570765
ABSTRACT:
A method and an apparatus to perform Secure Real-time Transport Protocol-on-the-fly (SRTPoF) are disclosed. In one embodiment, the method includes monitoring negotiation between a first Voice-over-Internet-Protocol (VoIP) device and a second VoIP device after a call has been initiated between the first and the second VoIP devices, determining whether the first VoIP device is Secure Real-time Transport Protocol (SRTP)-capable and whether the second VoIP device is SRTP-capable, and performing SRTP-on-the-fly on a Real-time Transport Protocol (RTP) stream transmitted between the first and the second VoIP devices to make the call secure if the first VoIP device is not SRTP-capable and the second VoIP device is SRTP-capable. Other embodiments have been claimed and described.
REFERENCES:
patent: 7308101 (2007-12-01), Wing
M. Bauger et al., “The Secure Real-time Transport Protocol (SRTP),” , Cisco Systems, Network Working Group, Mar. 2004, 56 pages.
“Traversal of IP Voice and Video Data through Firewalls and NATs”, RADVISION, A RADVISION Technology White Paper, 2001, 18 pages, Jul. 2001.
VoIP Basics, “A high level overview of Voice Over IP and its place in the New Zealand Market”, 13 pages, Oct. 23, 2004, http://216.239.57.104/search?q=cache:ooXqz58tg14J:www.nznog.org/2004/crigby-voip-i....
VoIP Basics, “EMERGIC.ORG Rajesh Jain's Weblog on Emerging Technologies, Enterprises and Markets,” Jun. 18, 2004, 3 pages, http://www.emergic.org/archives/indi/009137.php.
Blakely , Sokoloff, Taylor & Zafman LLP
King Simon
Sing Simon
SonicWALL, Inc.
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