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Re: IPv4 Security & MLS
I don't know much about how labeling and encryption interact, but isn't
it the case that once you encrypt something it becomes unclassified?
Otherwise you would never be able to send ciphertext over radio, open
phone lines, etc. Once you decrypt the information, of course, it again
becomes classified.
So it seems that any security labels would be logically part of the data
"inside" an encrypting security protocol, and thus not a direct
concern of the security protocol itself.
Phil