This whole site uses the Secure Sockets Layer (SSL) security protocol. This means that all date such as Usernames, Passwords, and Credit/Debit Card details are encrypted.
For Stripe, you need enter your email address and your credit/debit card number and 3 digit CVC number, and sometimes the date of expiry. My payments system needs your email address to link it with your registration. It retains the last 4 digits of your card number.
For PayPal, you are taken to their website for the payment, so my system doesn’t see any card information.
In both cases your information is transmitted under the SSL protocol.
You pick your own Username, which is non-changeable. You pick your own Password (I don’t have access to passwords) and I recommend that you change it at least once a year. When logging in, you can use either your Username or your Email address that you registered with. Obviously, you also need your Password. If your login details are correct, you gain access to the site. If you forget any of these pieces of information, choose HELP>AFTER REGISTRATION for various hints and tips.
You will see on the right-hand side of most pages a SiteLock Secure icon. This is a system I have which makes a daily check on the site for security breaches.
In addition, I have WordFence, a second security system specifically designed for WordPress sites. This checks constantly for suspicious activity such as Password hacks, changing core files, and other such rogue behaviours. When any are discovered the IP addresses of those responsible are blocked.