In dealing with altered multimedia news content, also referred to as fake news, we present a ready-to-deploy scheme based on existing public key infrastructure as a new fake news defense paradigm. This scheme enables news organizations to certify/endorse a newsworthy multimedia news content and securely and conveniently pass this trust information to end users. A news organization can use our program to digitally sign the multimedia news content with its private key. By installing a browser extension, an end user can easily verify whether a news content has been endorsed and by which organization. It is totally up to the end user whether to trust the news or the endorsing news organization. The underlining principles of our scheme are that fake news will sooner or later be identified as fake by general population, and a news organization puts its long-term reputation on the line when endorsing a news content.

翻译：针对篡改的多媒体新闻内容（亦称为假新闻），我们提出一种基于现有公钥基础设施的即时部署方案，作为新的假新闻防御范式。该方案使新闻机构能够对具有新闻价值的多媒体内容进行认证/背书，并将信任信息安全便捷地传递给终端用户。新闻机构可通过我们的程序使用其私钥对多媒体新闻内容进行数字签名，而终端用户只需安装浏览器扩展程序，即可轻松验证新闻内容是否获得背书及其背书机构。是否信任该新闻或背书新闻机构完全取决于终端用户。本方案的核心原则在于：假新闻迟早会被公众识别为虚假，而新闻机构在背书新闻内容时，实则是在押注其长期声誉。