Which method is the best way to store credit card numbers for easy reordering on an e-commerce website?

The best method to store credit card numbers for easy reordering on an e-commerce website is to utilize tokenization of the credit cards in the database. Tokenization replaces sensitive card information with unique identification symbols, or tokens, that retain all the important information about the data without compromising its security. This method allows businesses to process transactions without the need to store actual credit card numbers, reducing the risk of data breaches and ensuring compliance with security standards such as PCI DSS.

Using tokenization, the original credit card number is securely stored in a tokenization vault, while the e-commerce website handles only the token. This means that even if the database is compromised, the attacker would gain access only to non-sensitive tokens, making it nearly impossible to reverse-engineer the original credit card information.

Other methods like salting, encrypting in transit, and hashing serve different purposes. While salting and hashing are essential techniques for protecting passwords and other types of sensitive data, they are not suitable for credit card numbers in this context, as they don't allow for the retrieval of the original data. Encrypting credit card information in transit ensures that data is protected during transmission but does not address how it is stored in the database. Therefore, tokenization stands out as the most secure