A Fudan University expert warns facial recognition scans capture your entire background, not just the face. Tips include dressing appropriately, checking your surroundings, and avoiding private spaces like bathrooms during scans.
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"Don't Be Naked When You Scan": Expert Warns Facial Recognition Sees More Than Just Your Face
You probably use facial recognition quite often nowadays—whether it's for Alipay, WeChat Pay, or verifying your identity on various apps. While it feels like a routine task, a viral warning from a Fudan University professor has sparked a massive debate about what exactly is happening behind that little circular frame on your screen.
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A topic titled "Make sure to wear clothes during facial recognition" recently trended on Chinese social media, leaving many users panicked. The discussion centers on a PSA from Professor Zhang Junping, a doctoral supervisor at Fudan University's School of Computing and Intelligent Innovation.
His message is simple: The camera captures much more than just your face.
The "Mask" Illusion
According to Professor Zhang, the circular or oval frame you see on your phone screen during a scan acts only as a "mask" for the user interface. In reality, the system often captures the entire area covered by the camera lens.
"You really must dress well," Professor Zhang warned in his viral video. "The camera doesn't just see the content within this round area; it actually sees everything. So, do not perform facial recognition while bathing."
The professor's explanation implies that if you are doing a scan while shirtless, in bed, or in the bathroom, those peripheral images are technically being captured and uploaded to the system's backend for processing.
Why do we have to nod and blink?
Professor Zhang also explained the "liveness detection" steps—those sometimes annoying requests to nod your head, blink, or open your mouth. This isn't just for accuracy; it was originally developed to prevent insurance fraud.
"It started with pension insurance," Zhang noted. In some cases, families attempted to continue claiming benefits for deceased relatives by holding up a photograph to the camera. "The best way [to prevent this] is to make the person 'come alive'—moving eyes, shaking the head, or opening the mouth proves you are a living person."
Practical Tips
Since facial recognition is unavoidable for most of us in China, here is how to protect your privacy:
Dress Appropriately: Treat every facial recognition prompt as if you are standing in front of a real person.
Check Your Background: Be aware of what is behind you (e.g., laundry, open bathroom doors, or other people).
Avoid Sensitive Locations: Never perform a scan in the bathroom, in bed, or in private spaces where you wouldn't want a full-frame photo taken.
Use Good Lighting: This helps the scan finish faster, reducing the time your camera is active and capturing data.
Source: 极目新闻
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