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Smartphone fingerprint sensors don't store actual fingerprint images — instead, they convert distinctive features into mathematical values.

What is the most important reason for taking this approach?

It significantly reduces the amount of storage space required
Even if the data is leaked, the original fingerprint cannot be reconstructed from it ✓
It ensures broad compatibility across different sensor types

Even if the data is leaked, the original fingerprint cannot be reconstructed from it
The mathematical transformation is one-way and cannot be reversed, so even if the data is compromised, an attacker has no way to recreate the actual fingerprint image.

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