Feistel is a German surname. Notable people with the surname include:
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Horst Feistel
Horst Feistel (January 30, 1915 – November 14, 1990) was a German-American cryptographer who worked on the design of ciphers at IBM, initiating research that culminated in the development of the Data Encryption Standard (DES) in the 1970s. The ...
(1915–1990), German American cryptographer
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Feistel cipher
In cryptography, a Feistel cipher (also known as Luby–Rackoff block cipher) is a symmetric structure used in the construction of block ciphers, named after the German-born physicist and cryptographer Horst Feistel, who did pioneering research ...
, a construction for designing modern ciphers
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Magdalena Feistel (born 1970), Polish tennis player
{{surname, Feistel
German-language surnames