During exchange of a public key to a 3rd party - they rejected the key for not having a compatible cipher; so, after doing some research the key was edited within gpg to update prefs on the key which now shows a compatible cipher (in this case, AES-256). I re-exported the public key and noticed that the ascii representation was different - this leads me to my question, which is: is this new key 100% compatible with the old key? To elaborate, will previous other 3rd party entities (equipped only with the non-updated prefs version) still be able to decrypt and accept messages signed with the new key? Preliminary testing shows that the updated prefs version encrypted message is able to be decrypted and signature verified on the non-updated prefs version keyring system.
I am thinking (from preliminary tests) that the "key" information does not get updated at all - but, somehow, the cipher preferences are embedded in the public key - hence, the reason that the exported public key ASCII representation was different before and after updating preferences. Any understanding that someone can add to this would be very much appreciated. Thanks. --Robert
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