To keep all merchants using the Adyen integration safe and secure, we’re excited to announce a better solution with Secured Fields https://docs.adyen.com/developers/checkout/api-integration
Adyen’s Secure Fields integration shifts the encryption of data out of your scope towards us.
This is mandatory for new customers and will reduce risks associated with third-party technology and will keep your company secure. If you need help on upgrading to Secured Fields please contact our support
Secure Fields is a more secure way of processing credit card data, because it shifts the encryption of card data from the merchant's side towards Adyen. Which means, the risk of malicious code being injected into your servers by third party technology to obtain credit card data is greatly reduced.