Token

The token is a reference from the card converted into a different code (i.e. identifier/token), allowing the Merchant to save the card for future payments without having the card information for PCI DSS purposes.

Tokenization

Tokenization is the process of substituting a sensitive data element with a non-sensitive equivalent to save this information in the Client wallet and improve the Client experience on the next visit. The token is a reference (i.e. identifier) that maps back to the sensitive data through a tokenisation system. 

The mapping from original data to a token uses a method that render tokens infeasible to reverse in the absence of the tokenisation system, for example using tokens created from random numbers.