Enthusiastic IT Specialist for application development and computer science student.
Unapproved software architect.
Looking forward to dive into glitch art, data science and machine learning.
I want to add, that this idea is quite old and mostly used by analytics-services. It will even work, if someone has enabled ad blockers, because the browser cannot decide about the purpose of an image in a website a priori. In Addition to that, you can log information of the request headers (or even TCP packages). When used for analytics, images are very small sized (1px * 1px or smth similar) and/or transparent. By using many different metrics, that can be inferred by request, even cross-site tracking is possible without cookies or anything. Though it wont be very precise as well as not long-term representative (Client ip‘s change normally in regular intervals).
I want to add, that this idea is quite old and mostly used by analytics-services. It will even work, if someone has enabled ad blockers, because the browser cannot decide about the purpose of an image in a website a priori. In Addition to that, you can log information of the request headers (or even TCP packages). When used for analytics, images are very small sized (1px * 1px or smth similar) and/or transparent. By using many different metrics, that can be inferred by request, even cross-site tracking is possible without cookies or anything. Though it wont be very precise as well as not long-term representative (Client ip‘s change normally in regular intervals).
Very informative, Thank you