3 ms·
If we force If-Modified-Since to be in the last year and limit it to 1 minute resolution, that leaves 19 bits worth of uniqueness for the site to play with - pr
by caf 15y ago
If we force If-Modified-Since to be in the last year and limit it to 1 minute resolution, that leaves 19 bits worth of uniqueness for the site to play with - probably not enough for tracking on a large affiliate network?
- sirclueless 15y agoPerhaps, but it's still 19 bits that can be set independently of any other identifying traits like the User-Agent string.
- socratic 15y agoCan n image GETs (or similar) be used to produce 19*n bits of uniqueness, presuming that the affiliate network is willing to handle a factor of n more requests?
- sirclueless 15y agoOof, you're right. These are better than cookies because you can set them for specific URLs. Correlating requests wouldn't be too hard, just look for consecutive requests from the same IP with the same referrer.