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Not So Secret: Analysis of KakaoTalk's Chat E2EE Feature
Finding flaws in KakaoTalk’s end-to-end encryption feature Secret Chat.
However, the RSA key-pair, which is used to exchange a new secret value that in turn is used to generate a new message encryption key, is long-lived and is not replaced automatically (on Android, it’s stored on the phone in the TalkKeyStore.preferences.xml Shared Preferences or KakaoTalk.db database). In October 2014, Jin Woo Jung, a vice representative of the Labor Party, announced in a press conference that he was accused by the government of"causing public unrest" for organizing a demonstration. In order to regain trust, Kakao’s co-CEO Sirgoo Lee reacted with a press conference saying"We stopped accepting prosecution warrants to monitor our users' private conversations from 7 October, and hereby announce that we will continue to do so.".
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