Hello, security is a core component of all payment gateways, so every transaction that takes place between the merchant and the issuing bank is encrypted to protect sensitive financial information. For example PayAdmit, about which you can read detailed information at
PayAdmit: Online Payment Processing | Payment system for the site, the service for accepting payment . It is an online payment gateway that allows small and medium-sized online merchants to accept credit card and electronic check payments from websites and automatically deposit funds into their bank account.