The blockchain security firm CertiK claims it has uncovered a major vulnerability on Telegram messenger that could expose users to malicious attacks, but Telegram itself is calling the threat a hoax.

The reports say Pavel Durov, the co-founder and chief executive of the messaging service Telegram, was arrested and detained in France on Saturday. French law enforcement have arrested the CEO of the ...

Olga Logunova does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...