Can you explain why or link a source? I’d like to learn the details.
It’s all a heuristic and even with high collision hashing, analytics would provide some additional insight.
Analytics is not about absolute accuracy, it's about measuring differences; things like which pages are most popular, did traffic grow when you ran a PR campaign etc.
> ‘personal data’ means any information relating to an identified or identifiable natural person (‘data subject’); an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural person;
In this context, if I define a hashing function that e.g. sums all ip address octets, what then?
Summing octets is non-reversable, so it seems like a good 'hash' to me (but note: you'll get a lot of collisions). And of course, IANAL.
The linked article talks about identification numbers that can be used to link a person. I am not a lawyer but the article specifically refers to one person.
By that logic, if the hash you generate cannot be linked to exactly one, specific person/request - you’re in the clear. I think ;)