I am on creating a system, I am trying to ensure that user cannot register more than once even he uses different email-addresses or he changes its ip, so what strategies should i use ? can I do it with cookies ?
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I am on creating a system, I am trying to ensure that user cannot register more than once even he uses different email-addresses or he changes its ip, so what strategies should i use ? can I do it with cookies ?
There is nothing you can do to prevent users from registering them multiple times.
User could have:
Dynamic IP
Clear cookies
Clone MAC address
Use a different email account
No sane user would purchase additional hardware like biometric authentication
User could have multiple credit cards, and addresses
The best case, if to forbid the use of multiple accounts, in the TOS/AUP, and delete/ban those accounts.