Lightweight security mechanism for PSTN-VoIP cooperation

Details Lightweight security mechanism for PSTN-VoIP cooperation Lightweight security mechanism for PSTN-VoIP cooperation

2006-12-08

arxiv.org/abs/cs/0612054v1

Computer Science

Cryptography and Security

6 pages, 5 figures

Scientific paper

In this paper we describe a new, lightweight security mechanism for PSTN-VoIP cooperation that is based on two information hiding techniques: digital watermarking and steganography. Proposed scheme is especially suitable for PSTN-IP-PSTN (toll-by-passing) scenario which nowadays is very popular application of IP Telephony systems. With the use of this mechanism we authenticate end-to-end transmitted voice between PSTN users. Additionally we improve IP part traffic security (both media stream and VoIP signalling messages). Exemplary scenario is presented for SIP signalling protocol along with SIP-T extension and H.248/Megaco protocol.

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