Ko te whakamārama tuatahi o te cryptanalysis i hoatu e te 9th-rau tau Arapi polymath, Al-Kindi (hoki e mohiotia ana ko "Alkindus" i roto i Europe), i roto i te A Manuscript on Deciphering Cryptographic Messages. Kei roto i tenei pukapuka he whakaahuatanga o te tikanga o te tātari auau (Ibrahim Al-Kadi, 1992- ref-3). Italian scholar Giambattista della Porta was author of a seminal work on cryptanalysis "De Furis Literarum Nottivis". Frequency is the basic tool for breaking most classical ciphers. I roto i etahi reo, nga reta o te ira i puta i te nuinga o te wā i roto i te kupu huna; i roto i te kupu huna "Ecynthesis" ko te kupu huna tino haumaru i roto i te kupu huna i roto i te reo Ingarihi, i roto i te maha o nga rau tau i muri mai. Na reira, ko te kupu "Ecynthesis" i hangaia e Charles V. Schopenberg, he tauira o te kupu huna i roto i te reo Ing
Ko William Friedman