Yeloow dots on printed papers - how to best detect them in Affinity Photo?

[Lukáš Raynor Majer]

Hello,

we all know that we are spied and all papers from our printers contains secret yellow dots code. I detected them in document printed on my printer and scanned on 1200 DPI scanner. I attached pictures. That big one with green surface is best to be viewed on big monitor with high resolution (I have 5K iMac). That dark one scan is detailed view on yellow dot on white paper (1000% zoom).

My question to Affinity Photo pros:

Can you please tell me what is the best way to detect these dots on paper via Affinity Photo? On Mac or iPad.

Thanks.

 

Untitled.tiff

Edited June 8, 2020 by Lukáš Raynor Majer

[Lukáš Raynor Majer]

This is scary, just few pixels!

 

Edited June 9, 2020 by Lukáš Raynor Majer
Added scanned invoice

[John Rostron]

12 hours ago, Lukáš Raynor Majer said:

we all know that we are spied and all papers from our printers contains secret yellow dots code

I don't know this. It sounds like conspiracy theory to me. Not scary at all.

This just looks like noise to me. Use a good deNoise processor, starting with the one in Photo.

[kaffeeundsalz]

@John Rostron This is what Lukáš is referring to: https://en.wikipedia.org/wiki/Machine_Identification_Code.

[John Rostron]

Well, I live and learn. Doesn't sound all that secret though, or even scary.

John

[Lukáš Raynor Majer]

3 hours ago, kaffeeundsalz said:

@John Rostron This is what Lukáš is referring to: https://en.wikipedia.org/wiki/Machine_Identification_Code.

Yes, this is one of the ways how FBI / NSA identifies leaked documents. But they apply these tracking codes to ALL printers.

Edited June 9, 2020 by Lukáš Raynor Majer
I added white, not printed, just scanned paper, check metadata for printer model and software I used (and time and date :-) )

[R C-R]

10 hours ago, Lukáš Raynor Majer said:

Yes, this is one of the ways how FBI / NSA identifies leaked documents. But they apply these tracking codes to ALL printers.

Even the Electronic Frontier Foundation (EFF) says there is no way to know if so-called "tracking dots" or other forensic markings are created by all printers, or which agencies of which governments or other entities could decode them.

Besides, if they are applied, to track anything requires at least temporary physical access to the printout itself.