Speech technology for communication, accessing information and services has rapidly improved in quality. It is convenient and appealing because speech is the primary mode of communication for humans. Such technology however also presents proven threats to privacy. Speech is a tool for communication and it will thus inherently contain private information. Importantly, it however also contains a wealth of side information, such as information related to health, emotions, affiliations, and relationships, all of which are private. Exposing such private information can lead to serious threats such as price gouging, harassment, extortion, and stalking. This paper is a tutorial on privacy issues related to speech technology, modeling their threats, approaches for protecting users' privacy, measuring the performance of privacy-protecting methods, perception of privacy as well as societal and legal consequences. In addition to a tutorial overview, it also presents lines for further development where improvements are most urgently needed.

翻译：用于通信、信息获取和服务的语音技术在质量上得到了快速提升。由于语音是人类主要的交流方式，因此该技术既便捷又具吸引力。然而，这类技术也带来了已证实的隐私威胁。语音作为通信工具，本身必然包含私人信息。重要的是，它还包含丰富的侧信息，例如与健康、情感、从属关系及人际关系相关的信息——这些均属隐私范畴。暴露此类隐私信息可能导致严重威胁，如价格欺诈、骚扰、勒索和跟踪。本文是一篇关于语音技术相关隐私问题的教程，涵盖威胁建模、用户隐私保护方法、隐私保护方法性能评估、隐私感知以及社会与法律后果。除教程概述外，本文还指出了亟需改进的后续发展方向。