WhatsApp founder quits amid rumours of a falling-out with Facebook over security

Jan Koum co-founder and CEO of Whats App speaks at the WSJD Live conference in Laguna Beach

A month after Whatsapp's parent company Facebook was hit by the Cambridge Analytica data leak scandal, Jan Koum, the CEO of WhatsApp, is leaving the company and Facebook.

Acton left the messaging service company in September to start a foundation, after spending eight years with WhatsApp.

He continued: "I'm taking some time off to do things I enjoy outside of technology, such as collecting rare air-cooled Porsches, working on my cars and playing ultimate frisbee".

"I'm leaving at a time when people are using WhatsApp in more ways than I could have imagined", said Koum in a Facebook post announcing the decision. "The team is stronger than ever and it'll continue to do wonderful things", Koum said in a Facebook post announcing his resignation. The confirmation came after the Washington Post reported Monday that Koum was getting ready to leave over disagreements over the company's direction and issues like encryption.

Keeping WhatsApp independent of outside interference even from the company that bought it and preserving the privacy of its user data were central to Koum and Acton's vision for its messaging app. "Thanks to everyone who has made this journey possible". "But it is time for me to move on", wrote Koum on his Facebook profile.

In a reply to Mr Koum's Facebook post, Mr Zuckerberg credited him with teaching him "about encryption and its ability to take power from centralised systems and put it back in people's hands". WhatsApp added end-to-end encryption to the platform in 2016.

The Facebook founder said he would miss working closely with Mr Koum. Back in March, we reported about how Aleksandr Kogan, a University of Cambridge professor, accessed the data of more than 50 million Facebook users after creating a survey filled out by 270,000 people.

"In a February blog post on the Signal Foundation site, Acton wrote: "(Signal founder) Moxie (Marlinspike) and I share a belief that the best way to continue to ensure the universal availability of high-security and low-priced communications services like Signal is to do so through a foundation structure that is free of the inherent limitations of a for-profit company. "Those values will always be at the heart of WhatsApp".

Facebook has taken steps in recent months to generate revenue from WhatsApp, which unlike Facebook's flagship social network does not have advertising.

Other gradual changes that pushed Facebook and WhatsApp closer together reportedly served to increase tensions between the two companies, culminating in Koum announcing his departure this week, with the Post describing the Ukrainian-born entrepreneur as "worn down by the differences in approach".

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