CT-ER: Collaborative Research: Detecting Spam in IP Multimedia Communication Services

VoIP以及即时消息等基于文本的系统，沿着，可能会逐渐取代电路交换电话系统。 VoIP提供了全球和低成本通信的承诺。 然而，这些属性也使VoIP成为一个有前途的目标供应商的未经请求的批量通信。 不请自来的电话，有时被称为“吐”（垃圾邮件通过互联网电话）可以更恼人和破坏性比电子邮件垃圾。 例如，这样的电话可能在半夜到达，或者可能扰乱商务会议。 这样的电话可能被用于广告或征求私人信息的社会工程，延伸到一个新的realm.The信任，声誉和滋扰的社会意义是完全不同的交互式语音通信相比，电子邮件的威胁网络钓鱼。这个建议描述了一个全面的呼叫准入控制框架，接受，拒绝或转发来电语音邮件系统。 我们将正式确定语音通信的信任和声誉概念。 其中一种机制是信任路径的概念，它反映了用户和域之间以前的通信关系。 我们计划设计的方法集成几个社会技术的方法，最大限度地减少错误rejects.The方法将在VoIP安全测试平台正在开发的四所大学（UNT，哥伦比亚，普渡大学和加州大学戴维斯分校）进行测试。 结果将反馈到IETF和其他地方正在进行的标准化活动中。

VoIP, along with text-based systems such as instant messaging, is likely to gradually replace the circuit-switched telephone system. VoIP offers the promise of global and low-cost communications. However, these attributes also make VoIP a promising target purveyors of unsolicited bulk communications. Unsolicited phone calls, sometimes referred to as "spit" (Spam over Internet Telephony) can be even more annoying and disruptive than email spam. For example, such phone calls may arrive in the middle of the night or may disrupt a business meeting. Such calls may be used for advertising or for soliciting private information by social engineering, extending the threat of phishing into a new realm.The social meaning of trust, reputation, and nuisance are quite different for interactive voice communication compared to e-mails.This proposal describes a comprehensive call admission control framework for accepting, rejecting or forwarding incoming calls to a voice mail system. We will be formalizing notions of trust and reputation for voice communications. One such mechanism is the notion of trust paths that reflect previous communication relationships between users and domains. We plan to devise methods for integrating several social-technical methods for minimizing false rejections.The methods will be tested in a VoIP security testbed being developed by four universities (UNT, Columbia, Purdue and UC Davis). Results will be fed back into on-going standardization activities in the IETF and elsewhere.