In https://howhttps.works/the-keys/ https://howhttps.works/the-keys/ The public key is represented by a blue key but… wouldn't it be more simple to say the pub

In https://howhttps.works/the-keys/ https://howhttps.works/the-keys/ The public key is represented by a blue key but… wouldn't it be more simple to say the public key is an open padlock the sender closes on the box after putting their message in it? Padlocks can only be open by one key, the private one.