[brtkdotse]

This is my understanding as well - no matter how obfuscated the final identifier is, if you derived it from PII then it’s considered PII as well.

However, IANAL.

[slake]

If the final identifier can't be reverse engineered to identify the specific individual is it PII?

So A user visited me on the 12th. That user visited me again on the 15th. Is that PII?