What is the difference between unhashed IP(v4)'s and md5 hashes? Pretty easy and very fast to solve that puzzle.
If we really want to collect IPs for statistical use (with disclaimer), I would say (for IPv4) to only store the first two octets. IIRC that should still be enough to get country information and other stuff from it. And also I wouldn't expose even those raw anonymised IPs together with timestamps, but show aggregated stats only.
Am 27.08.2014 um 16:33 schrieb Petr Bena:
Note these IP addresses would be turned to md5 hashes.