user tracker with ETag

用户追踪, without cookies

clear cache bug

实现原理

1. HTTP cache
2. hidden iframe
3. 1px image

demo

https://hinternesch.com/page1.html

https://logs1412.xiti.com/hit.xiti?s=610235&idclient=460451917943&ts=1594774262413&vtag=5.18.2&ptag=js&r=1680x1050x30x30&re=886x891&hl=8x51x2&lng=zh-CN&idp=0851029210876&jv=0&p=Hi. I am Page 3.&s2=&ref=https://hinternesch.com/page2.html

lawsuits problems

laws 法律问题/合规/隐私协议

refs

https://levelup.gitconnected.com/no-cookies-no-problem-using-etags-for-user-tracking-3e745544176b

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