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 are some legitimate reasons to have a separate keyboard. I use Keepass2Android’s keyboard to enter passwords from Keepass. This way, there’s direct access to the password database instead of copying passwords/usernames/other fields to the system clipboard.
There are some legitimate reasons to have a separate keyboard. I use Keepass2Android’s keyboard to enter passwords from Keepass. This way, there’s direct access to the password database instead of copying passwords/usernames/other fields to the system clipboard.