SSL (Secure Socket Layer) / TLS (Transport Layer Security) is the most common security protocol on the Internet or an internal network. In our society centered on a vulnerable Internet, SSL is generally used when a browser needs to connect securely to a web server.
In the case of browsers, users are notified of the presence of SSL security by displaying a padlock and the "https" protocol in the url, and, in the case of extended validation SSL, by the green address bar.
PayPal helps to protect your credit card information with the best security and fraud prevention systems on the market. When you use PayPal, your financial information is never shared with the merchant.
With PayPal, if an item you ordered online is not delivered or does not match the seller's description, we can refund the full amount of your purchase. We even cover certain intangible assets, such as electronic tickets and downloads.
3D-Secure (or 3DS) protects merchants and buyers against the fraudulent use of credit cards by adding a second level of security when finalizing a payment.
After entering his bank details, your customer is redirected to his bank's website and must confirm that he is the holder of the card used for payment via an authentication method: code sent by SMS or entry of the date of birth for example.