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SIGABA
Sign in to savethumb|upright=1.2|SIGABA cipher machine at the National Cryptologic Museum, with removable rotor assembly on top In the history of cryptography, the ECM Mark II was a cipher machine used by the United States for message encryption from World War II until the 1950s. The machine was also known as the SIGABA or Converter M-134 by the Army, or CSP-888/889 by the Navy, and a modified Navy version was termed the CSP-2900.
Article
8 sectionsContents
- History
- Description
- Operation
- Security
- Interoperability with Allied counterparts
- See also
- References
- External links
thumb|upright=1.2|SIGABA cipher machine at the National Cryptologic Museum, with removable rotor assembly on top In the history of cryptography, the ECM Mark II was a cipher machine used by the United States for message encryption from World War II until the 1950s. The machine was also known as the SIGABA or Converter M-134 by the Army, or CSP-888/889 by the Navy, and a modified Navy version was termed the CSP-2900.
Like many machines of the era it used an electromechanical system of rotors to encipher messages, but with a number of security improvements over previous designs. No successful cryptanalysis of the machine during its service lifetime is publicly known.