The Right to be Forgotten (technically the right to erasure or for users to have personal data removed from service providers’ records) creates a big problem for suppliers. This right is becoming standard across the new global wave of data protection and consumer privacy legislation that has followed GDPR.
Tokenization is a branch of cryptography, but should not be confused with encryption. Encryption is used to hide strings of text based on mathematics. Tokenization replaces individual characters with a different character based on randomness. If you can reverse the encryption mathematics, you get access to the entire string of encrypted text. If you can reverse the token randomness, you get access to a single character.