Add Yahoo as a preferred source to see more of our stories on Google. Pavel Durov, chief executive officer of Telegram, at the Mobile World Congress in Barcelona, Spain, on Feb. 23, 2016. (Chris ...

Pavel Durov, the co-founder and CEO of Telegram, has pledged to “significantly improve” the moderation of criminal activity on his messaging app, 12 days after he was arrested in France. Durov wrote ...