| Label | Vocabulary | Concept | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | DES | Preservation Vocabs (all) |
des | ||
| 2. | Blowfish | Preservation Vocabs (all) |
blo | ||
| 3. | Password protection | Preservation Vocabs (all) |
pas | ||
| 4. | PGP | Preservation Vocabs (all) |
pgp | ||
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