Twitter to introduce encrypted messaging and new chat services

Twitter is set on Wednesday to launch a service that lets users of the platform send encrypted direct messages, while the social media company also plans to add voice and video calling capabilities, according to CEO Elon Musk.

In a tweet, Musk said the update will include at least two new functions to the platform's direct messaging, or DM, feature, in addition to introducing encryption for DMs. 

"The acid test is that I could not see your DMs even if there was a gun to my head," wrote Musk, who owns Twitter.