SUMMARY
The iPhone 18 Pro and Pro Max introduce 'Reference Image' mode, which cryptographically signs captured pixel data directly within the sensor. This creates a verifiable, signed copy of the photo that can be authenticated by anyone, proving its origin and integrity. The process involves capturing a normal photo alongside a secure digital negative, which is then processed in Apple's Private Cloud Compute to generate a second, signed reference image. This reference image allows viewers to compare the published photo against what the sensor originally captured, highlighting any alterations or crops, and is designed to be resistant to future quantum computing threats.
TAKEAWAYS
iPhone 18 Pro's Reference Image mode signs raw sensor data for authenticity verification.
It creates a cryptographically signed copy of the photo, verifiable by anyone.
The feature captures a normal photo and a secure digital negative for comparison.
This method aims to prove photo authenticity without requiring photographer identification.