Libelle1864–1866 Libelle (cipher), a German cipher system Libelle (microcar), an Austrian 1950s vehicle Libelle, a fast jet aircrew g-suit Operation Libelle, an evacuation
Encryption by dateFeistel. Block Cipher Cryptographic System, US Patent 3,798,359. Filed June 30, 1971. (IBM) Henry Beker and Fred Piper (1982). Cipher Systems: The Protection