| 摘要 |
Disclosed are a user agent providing secure VoIP communication and a secure communication method using the same. A user agent of the invention has an additional module for providing a secure function as well as a module for providing general communication, thereby supporting the secure communication. In addition, as a secure communication method using the user agent, a signaling security mechanism negotiation method and a media encryption algorithm negotiation method are provided. Hence, it is possible to provide internet telephone users with a secure VoIP communication service.
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