The Russian founder of popular messaging app Telegram has warned that WhatsApp, the world’s top messaging app, will continue to be open to surveillance after the Facebook-owned platform had to tell users that their phones could be infected with spyware. BusinessLIVE reports that Pavel Durov, a maverick programmer who created Telegram to offer securely encrypted communications, posted a blog titled ‘Why WhatsApp will never be secure’. Telegram has repeatedly come under fire from authorities in Russia over its strong encryption and it is officially blocked in the country. ‘WhatsApp has a consistent history – from zero encryption at its inception to a succession of security issues strangely suitable for surveillance purposes,’ Durov wrote. WhatsApp last week advised its 1.5bn users to upgrade the app to plug a security hole. The flaw allowed for the injection of sophisticated malware that could be used to spy on journalists, activists and others.