Research: TikTok browser can track users' keystrokes

The research from Felix Krause, a privacy researcher and former Google engineer, did not show how TikTok used the capability, which is embedded within the in-app browser that pops up when someone clicks an outside link. But Mr. Krause said the development was concerning because it showed TikTok had built in functionality to track users’ online habits if it chose to do so.

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Collecting information on what people type on their phones while visiting outside websites, which can reveal credit card numbers and passwords, is often a feature of malware and other hacking tools. While major technology companies might use such trackers as they test new software, it is not common for them to release a major commercial app with the feature, whether or not it is enabled, researchers said.

“Based on Krause’s findings, the way TikTok’s custom in-app browser monitors keystrokes is problematic, as the user might enter their sensitive data such as login credentials on external websites,” said Jane Manchun Wong, an independent software engineer and security researcher who studies apps for new features.

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