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There are multiple ways. All can be cheated. * Cookies: Can be deleted * IP-Adress: Not unique, because ISPs rotate them; also VPN * Login: Well create a secon
by sdoering 8y ago
There are multiple ways. All can be cheated.
* Cookies: Can be deleted
* IP-Adress: Not unique, because ISPs rotate them; also VPN
* Login: Well create a second one
* Methods from Universities using nth letter of name and nth digit of birthdate: Just make up a new name.
Sorry - but unless you are using an analog medium or asking the questions in person the numbers can be inflated and there is no way to have 100% data quality.
But in most contexts this is ok. So I would probably go the most easy way: Cookie.
I would - at least not in the European Union go with fingerprinting and such stuff, as I am not sure how this plays out regarding GDPR as this would be PII you are storing.