What is the Signal messaging app and how secure is it?
Signal has estimated 40-70 million monthly users - making it pretty tiny compared to the biggest messaging services, WhatsApp ...
U.S. News & World Report8 天
Signal Head Defends Messaging App's Security After US War Plan Leak
Signal Head Defends Messaging App's Security After US War Plan Leak By James Pearson LONDON (Reuters) -The president of ...