Ok this might sound like a silly question but i want to be 200% safe before i go ordering anything.When some randomer has your public key and sends u messages checking to see if things are working ok, (like i did also when starting learning this pgp). Is it best to make a new key only for dealing with vendors or is there no risk of some random person having my public key?Also, should i store all software related to my keys and keyring on a usb memory stick and not keep in in the same house as the computer I purchase off?Probably worrying about nothing but just wanna be fully sure. Thanks guys.