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WhatsApp Encryption Has a Backdoor, is Vulnerable to Snooping

The system relies on unique security keys "that are traded and verified between users to guarantee communications are secure and cannot be intercepted by a middleman," the report said.

AFP Relaxnews

Updated:January 14, 2017, 3:16 PM IST
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WhatsApp Encryption Has a Backdoor, is Vulnerable to Snooping
WhatsApp introduces verified business accounts. (Representative Image: Reuters)
The Facebook-owned mobile messaging service WhatsApp is vulnerable to interception, the Guardian newspaper reported on Friday (Jan 13, 2017), sparking concern over an app advertised as putting an emphasis on privacy.

The report said that WhatsApp messages could be read without its billion-plus users knowing due to a security backdoor in the way the company has implemented its end-to-end encryption protocol.

The system relies on unique security keys "that are traded and verified between users to guarantee communications are secure and cannot be intercepted by a middleman," the report said.

But WhatsApp can force the generation of new encryption keys for offline users "unknown to the sender and recipient of the messages," it said.

Tobias Boelter, a cryptography researcher at the University of California told the Guardian: "If WhatsApp is asked by a government agency to disclose its messaging records, it can effectively grant access due to the change in keys."

Boelter said he had reported the backdoor vulnerability to Facebook in April 2016 and was told that Facebook was already aware of the issue but that it was not actively being worked on.

The company said in a statement that it provided a "simple, fast, reliable and secure" service.

It said there was a way of notifying users when a contact's security code had changed.

"We know the most common reasons this happens are because someone has switched phones or reinstalled WhatsApp. In these situations, we want to make sure people's messages are delivered, not lost in transit," it said in a statement.

But the Guardian said it had verified that the security backdoor still exists.

The paper quoted Steffen Tor Jensen, head of information security and digital counter-surveillance at the European-Bahraini Organisation for Human Rights, saying: "WhatsApp can effectively continue flipping the security keys when devices are offline and re-sending the message, without letting users know of the change till after it has been made, providing an extremely insecure platform".

Facebook bought WhatsApp in 2014 but it continues to operate as a separate app.
(Get detailed and live results of each and every seat in the Lok Sabha elections and state Assembly elections in Andhra Pradesh, Odisha, Arunachal Pradesh and Sikkim to know which candidate/party is leading or trailing and to know who has won and who has lost and by what margin. Our one-of-its-kind Election Analytics Centre lets you don a psephologist’s hat and turn into an election expert. Know interesting facts and trivia about the elections and see our informative graphics. Elections = News18)
| Edited by: Siddhartha Sharma
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