Signal Is Latest Encrypted Messaging App Apparently Blocked in China

The messaging app Signal has become unusable for many people in mainland China, with users concluding it has apparently been blocked by authorities. Signal was one of the last widely used messaging apps that could send and receive encrypted messages in China without the use of a virtual private network, or VPN. Asia tech reporter Stephanie Yang discusses what the blocking of Signal and other services means for discourse in China. Christopher Zinsli hosts. Learn more about your ad choices. Visit megaphone.fm/adchoices