Title :
A PKI-free key agreement protocol for P2P VoIP applications
Author :
Pecori, Riccardo
Author_Institution :
Dept. of Inf. Eng., Univ. of Parma, Parma, Italy
Abstract :
The security of the protocols involved in peer-to-peer communications is becoming a fundamental prerequisite for their widespread diffusion. In this paper, we propose a new protocol for establishing a security association between two peers willing to set up a VoIP or multimedia communication through the standard SIP protocol. Our proposal is based on the MIKEY protocol and the Diffie-Hellman algorithm for key establishment, in a ZRTP like way. Beside this shared-secret-free method, we allow also the authentication via peer certificates without using any centralized PKI. An opportune distributed certificate management is also described. The proposed method has been also implemented and integrated in an open source SIP UA.
Keywords :
Internet telephony; computer network security; cryptographic protocols; message authentication; multimedia communication; peer-to-peer computing; public key cryptography; signalling protocols; Diffie-Hellman algorithm; MIKEY protocol; P2P VoIP applications; PKI-free key agreement protocol; multimedia communication; open source SIP UA; opportune distributed certificate management; peer certificate authentication; peer-to-peer communications; protocol security; security association; shared-secret-free method; standard SIP protocol; Authentication; DH-HEMTs; Peer to peer computing; Protocols; Public key; Synthetic aperture sonar; Key agreement; Peer-to-peer; VoIP; Web of trust;
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
DOI :
10.1109/ICC.2012.6364948
