Five months after The Guardian published an investigative report, in which it found a "backdoor" in the Facebook-owned service, the publication is finally making amendments. The January report immediately stirred controversy among security experts, who began questioning The Guardian's piece. Weeks later, Zeynep Tufekci, a researcher and op-ed writer for the New York Times, published an open letter with over 70 major security researchers working at major universities and companies like Google condemning the story, and asking the publication to retract it.. Paul Chadwick, The Guardian's reader's editor, said "The Guardian was wrong to report last January that the popular messaging service WhatsApp had a security flaw so serious that it was a huge threat to freedom of speech." From his article: In a detailed review I found that misinterpretations, mistakes and misunderstandings happened at several stages of the reporting and editing process. Cumulatively they produced an article that overstated its case. The Guardian ought to have responded more effectively to the strong criticism the article generated from well-credentialled experts in the arcane field of developing and adapting end-to-end encryption for a large-scale messaging service. The original article -- now amended and associated with the conclusions of this review -- led to follow-up coverage, some of which sustained the wrong impression given at the outset. The most serious inaccuracy was a claim that WhatsApp had a "backdoor", an intentional, secret way for third parties to read supposedly private messages. This claim was withdrawn within eight hours of initial publication online, but withdrawn incompletely. The story retained material predicated on the existence of a backdoor, including strongly expressed concerns about threats to freedom, betrayal of trust and benefits for governments which surveil. In effect, having dialled back the cause for alarm, the Guardian failed to dial back expressions of alarm.