"Privacy leaks in social network profile images: a study of Facebook's access control mechanisms and user misconceptions."
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While "magic" tools are usually fake, there are a few manual "tricks" that people have used in the past, though Facebook frequently patches these vulnerabilities: "Privacy leaks in social network profile images: a
: Non-friends can only see a small thumbnail of the profile picture. They cannot click it to expand it or view it in full resolution. Critical Safety and Privacy Warnings : Uses session
These videos typically:
: If a user previously had their profile set to "Public" before locking it, searching their name plus "Facebook" on Google might reveal indexed versions of the full-size image. Critical Safety and Privacy Warnings
: Uses session mirroring to retrieve accessible data and HD images without requiring a login.