I like this line of thinking. It seems that the word "key" is not the problem so much as the terms describing the respective key's status as opposed to their fu

I like this line of thinking. It seems that the word "key" is not the problem so much as the terms describing the respective key's status as opposed to their function. Perhaps something along the lines of "locking" and "unlocking" keys, or "encryption" key and "decryption" key (and, of course, "signing" key, no one has to know this is the same thing as your "decryption" key).