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

VoIP以及即时消息等基于文本的系统可能会逐渐取代电路交换电话系统。VoIP提供了全球和低成本通信的前景。然而，这些属性也使VoIP成为主动提供大量通信的有前途的目标提供商。未经请求的电话，有时被称为“Spit”(网络电话垃圾邮件)，可能比垃圾电子邮件更烦人，更具破坏性。例如，这样的电话可能会在半夜到达，或者可能会扰乱商务会议。这类电话可能被用于广告或通过社会工程获取私人信息，将网络钓鱼的威胁扩展到一个新的领域。对于交互式语音通信，信任、声誉和骚扰的社会意义与电子邮件截然不同。该提案描述了一个全面的通话准入控制框架，用于接受、拒绝或将来电转发到语音邮件系统。我们将正式确定语音通信的信任和声誉概念。一种这样的机制是反映用户和域之间先前通信关系的信任路径的概念。我们计划设计一些方法来整合几种社会技术方法，以最大限度地减少虚假拒绝。这些方法将在四所大学(北卡罗来纳大学、哥伦比亚大学、普渡大学和加州大学戴维斯分校)开发的VoIP安全试验台上进行测试。结果将反馈给IETF和其他地方正在进行的标准化活动。

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.