Your smartphone is putting a unique fingerprint on every photo(gcn.com)

9 pointsby tkschneidervor 9 Jahren2 comments

Your smartphone is putting a unique fingerprint on every photo

https://gcn.com/articles/2017/12/19/smartphone-authentication-prnu.aspx

2 comments

CMOS image sensors have lots of per pixel variation due to errors in the manufacturing processes. Examples are the "dark current", which causes patterns sometimes in images. Thats corrected for in software by all modern cameras.

99.5% accurate suggests successfully isolating 8 bits of device-specific data from a couple of megabytes of image data.

It is no surprise whatsoever that the basic corrections done on the images leave behind at least 8 bits of entropy.

tfmattvor 9 Jahren

I'll be looking forward to the 2018 Network and Distributed Systems Security Conference? Would this method work after compression is applied to the pics??