In this report, we analyze the Windows, Android, and iOS versions of Tencent’s Sogou Input Method, the most popular Chinese-language input method in China. Our analysis found serious vulnerabilities in the app’s custom encryption system and how it encrypts sensitive data. These vulnerabilities could allow a network eavesdropper to decrypt sensitive communications sent by the app, including revealing all keystrokes being typed by the user. Following our disclosure of these vulnerabilities, Sogou released updated versions of the app that identified all of the issues we disclosed.
Vulnerabilities in Sogou Keyboard encryption expose keypresses to network eavesdropping.
There is also a differece between invading your privacy and compromising your security. Both are bad, but one is much worse at least in my view. Keylogging and then sending those keystrokes back to base with a dodgey custom rolled encryption framework is not just a breach of privacy.
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There is also a differece between invading your privacy and compromising your security. Both are bad, but one is much worse at least in my view. Keylogging and then sending those keystrokes back to base with a dodgey custom rolled encryption framework is not just a breach of privacy.