  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.
