Format is the following in the datastore:
- (k/v) k:<fingerprint> -> (armored pgp)
- (set) n:<namespace> -> set of fingerprints
- (set) un:<uid-name> -> set of fingerprints
- (set) uc:<uid-name> -> set of fingerprints
- (set) ue:<uid-name> -> set of fingerprints
un -> name in the UID
uc -> comment in the UID
ue -> email in the UID
un is lower case
ue is normalized (white-spaces removed and lower case)