Probably there is certainly an excuse they do not want actually technical people taking a look at PhotoDNA. Microsoft says that “PhotoDNA hash isn’t reversible”. That’s not true. PhotoDNA hashes is projected into a 26×26 grayscale image definitely a little blurry. 26×26 was larger than a lot of desktop icons; it really is enough detail to recognize folk and objects. Reversing a PhotoDNA hash isn’t any more difficult than solving a 26×26 Sudoku problem; a job well-suited for computer systems.
You will find a whitepaper about PhotoDNA that We have independently circulated to NCMEC, ICMEC (NCMEC’s intercontinental counterpart), some ICACs, a number of tech manufacturers, and Microsoft. Some of the exactly who supplied suggestions comprise very concerned about PhotoDNA’s restrictions the report calls away. I have not provided my whitepaper people as it represent how-to change the algorithm (such as pseudocode). If someone else comprise to discharge rule that reverses NCMEC hashes into images, after that folks in control of NCMEC’s PhotoDNA hashes could well be in ownership of youngster pornography.
The AI perceptual hash answer
With perceptual hashes, the algorithm identifies identified graphics qualities. The AI solution is comparable, but alternatively than understanding the qualities a priori, an AI method is regularly “learn” the qualities. Continue reading