Apple details how Reference Image proves a photo is real

Apple explained how Apple Reference Image works on iPhone 18 Pro: the camera sensor cryptographically signs pixel data immediately after capture, creating a digital negative. Verification runs through Private Cloud Compute, the system is quantum-resistant and supports revoking compromised images.

• Sensor signs pixels right after capture, bypassing software processing
• Verification runs through Private Cloud Compute with authenticity scoring
• Apple calls it the only system with quantum-resistant protection
• Feature is optional and works only on the main camera