Telegram chat group
Telegram, a popular encrypted messaging app, will allow users to cloak their telephone numbers to safeguard Hong Kong protesters against monitoring by Chinese authorities, according to a person with direct knowledge of the effort.
Thousands of Hong Kong protesters take their cues from more than 100 groups on Telegram. Protesters use encrypted apps like Telegram to mobilize swiftly through multiple group chats, with less risk of police infiltration, Reuters found in a report published earlier this month.
Telegram chat groups are used to post everything from news on upcoming protests to tips on dousing tear gas canisters fired by the police to the identities of suspected undercover police and the access codes to buildings in Hong Kong where protesters can hide. Each district in Hong Kong has at least one chat group which becomes a fast communication tool for protestors to exchange information.