Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2008-05-13
2008-05-13
Chan, Wing (Department: 2619)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
Reexamination Certificate
active
07372856
ABSTRACT:
A method for Real-time Transport Protocol (RTP) packet authentication on a packet data network. In particular, the invention relates to a method for preventing toll fraud, privacy compromise, voice quality degradation, or denial of service (DoS) on Voice over IP networks. The Real-time Transport Protocol (RTP) is susceptible to several security attacks, including thirdparty snooping of private conversations, injection of forged content, and introduction or modification of packets to degrade voice quality. The Secure Real-time Transport Protocol (SRTP) provides confidentiality, message authentication, and replay protection for RTP traffic. However, SRTP incurs an additional overhead to verify the HMAC-SHA1 message authentication code for each packet. SRTP+ significantly decrease the verification overhead compared to SRTP and thereby increases the number of faked packets required to mount a successful denial of service attack. SRTP+ provides packet authentication but not integrity. SRTP+ is compatible with SRTP.
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Garg Sachin
Singh Navjot
Tsai Timothy Kohchih
Avaya Technology Corp.
Chan Wing
Jones Prenell
Muncy Geissler Olds & Lowe, PLLC
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