CT-ER: Collaborative Research: Detection of Spam in IP Multimedia Communication

VoIP和即时通讯等基于文本的系统可能会逐渐取代电路交换电话系统。VoIP提供了全球低成本通信的前景。然而，这些属性也使VoIP成为未经请求的批量通信的有希望的目标提供者。不请自来的电话，有时被称为“吐痰”（通过互联网电话发送的垃圾邮件），可能比垃圾邮件更令人讨厌和破坏性。例如，这样的电话可能会在半夜打来，或者可能会打断商务会议。这种电话可能被用于广告或通过社会工程征求私人信息，将网络钓鱼的威胁扩展到一个新的领域。与电子邮件相比，交互式语音通信的信任、声誉和讨厌的社会意义大不相同。该提案描述了一个全面的电话接纳控制框架，用于接受、拒绝或转发到语音邮件系统的来电。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。我们计划设计一些方法来整合几种社会技术方法，以最大限度地减少错误拒绝。这些方法将在由四所大学（UNT、哥伦比亚大学、普渡大学和加州大学戴维斯分校）开发的VoIP安全测试台上进行测试。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.