Friedrich Kasiski

Friedrich Kasiski
Born(1805-11-29)29 November 1805
Died22 May 1881(1881-05-22) (aged 75)
NationalityGerman
Known forFirst accounted procedure for attacking polyalphabetic substitution ciphers.

Major Friedrich Wilhelm Kasiski (29 November 1805 – 22 May 1881) was a German infantry officer, cryptographer and archeologist. Kasiski was born in Schlochau, Kingdom of Prussia (now Człuchów, Poland).