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SRTP Key Exchange Scheme Using Split Transfer of Divided RSA Public Key
Journal of The Korea Society of Computer and Information
Abbr :
JKSCI
2009, 14(12), pp.147-156
Publisher : The Korean Society Of Computer And Information
Research Area : Computer Science
2009, 14(12), pp.147-156
Publisher : The Korean Society Of Computer And Information
Research Area : Computer Science
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This paper proposes a SRTP key exchange scheme using split transfer of divided RSA public key in SIP-based VoIP environment without PKI. The existing schemes are hard to apply to real VoIP environment, because they require a PKI and certificates in the end devices. But in case of ZRTP, which is one of existing schemes, it’s able to exchange SRTP Key securely without PKI, but it is inconvenient since it needs user’s involvement. To solve these problems, the proposed scheme will split RSA public key and transmit them to SIP signaling secession and media secession respectively. It can defend effectively possible Man-in-The-Middle attacks, and it is also able to exchange the SRTP key without the user’s involvement. Besides, it meets the requirements for security of SRTP key exchange. Therefore, it’s easy to apply to real VoIP environment that is not available to construct PKI.
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