[CharlesW]

> What’s is the supposed business case for sharing raw, unmodified 42Mpix photos?

TFA (TFPR?) answers this.

"This technology is particularly applicable for passports and ID verification but goes further in tackling image manipulation in the media, medical and law enforcement fields. For the insurance and construction sectors, this technology will offer a secure foundation for inspection and recording of damage."

> And if they are still modified later on, and perhaps re-signed, that’s where I would attack.

Even so, the existence of an original capture makes post-capture attacks useless. An effective attack will modify the image before it's signed.