Some doubts about signature procedure

Hi, here I come back to ask you some clarification about the signature procedure. The purpose of signature procedure is making sure of anybody can't modify the file you're trying to send. Many times they use also the check of Md5sum or SHA512Sum, but anyway my question is: if any spiteful person

How can I send a public key exported with --armour option?

Hello everybody, I'm a beginner of Gpg and encryption's world in general, so I apologize if my questions will be so banal. I created a new pair of public-private keys and now I'm trying to export the public one. I read the "How-To" and it describe the more useful option --armour. I can't understan