How can you see if it was being hacked?

Im only using it to import a paper wallet from the bitcoin ATM in vancouver onto a bitaddress paper wallet I made, so I would need to use blockchain to quickly import it from one paper wallet to another. How can I make sure It's safe?
first make sure that SSL is on Green and its owned by blockchain , check that is Blockchain url and you should be safe
and i repeat myself maybe but use a bitcoin client that you can install on your computer