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>salt and hash all PII data

Can you share more detail on this? On this page[1], I see this:

  hash(pepper(salt(ip address + user agent data))) = anonymized hashed data
Both the ipv4 space and typical user agent possibilities are pretty small, so it feels like you could easily de-anonymize it when you want to. That is, assuming the "salt" and "pepper" are stored somewhere. I assume you do store them, otherwise it's not helpful to identify repeat visits.

[1] https://beamanalytics.io/data




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