I've done a few obvious searches on google and google scholar and not turned up any security analysis of FreeBSD's geli. Is there some out there, or has it gone unanalyzed since its introduction circa 2005? Frustratingly, it seems to have sprung into existence fully-formed and without explanation of the choices in e.g., deriving encryption keys from a master key via HMAC or deriving the key to the master key from passphrase and key files.
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