[user104658]

Not to sound like an ad or anything but if you want basically the ultimate online security, I recommend an app called Revolut. You can make a one-use virtual credit card, use it for your purchase, then delete it. You can make as many as you want. There's no way for your card details to be stolen, because no one ever gets your real card details... And you only need to load as much money onto the account as needed to make your purchase. You can also have a permanent virtual card, and you can also use that with Google Pay/Apple Pay on your phone (contactless). Honestly it's great. You can also swap currencies and even buy crypto on it if that's your sort of thing.

Also amazing for things like recurring card payments (subscriptions like Netflix, etc) , as they can only ever touch the money you've transferred on, they can't take a penny from your actual bank account. Great for keeping stuff organised.

I sound like I'm about to spam an affiliate link but I won't because I think it might include my name or summat