After chats are deleted, cleared or archived, a "forensic artifact" that can be "recovered and reconstructed" is left behind in the WhatsApp database.
'Privacy and security is in our DNA,' WhatsApp boasts on its website.
But a forensic scientist and security researcher claims the popular messaging app retains and stores traces of chats even after conversations have been deleted by users.
While this does not put users at risk, it creates a potential treasure trove of information for anyone with access to a device to tap into, an expert has warned.
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