"snegopa" - 1 õppematerjal

TheCodeBreakers

A poisonous infection had been cleaned out; a year later Iran abandoned her traditional neutrality and, signing the Baghdad Pact, aligned herself with the West. No cryptographic weakness imperils the operation of Russian spy rings. Perhaps the most striking example lies in the cipher used by Abel's lieutenant, Reino Hayhanen. The system dispensed with written keys such as Abel's one-time pad, which helped incriminate him. Hayhanen had to remember only four basic keys—SNEGOPA(D), the first 20 letters of a Russian popular song ("The Lone Accordion"), the date of the World War II victory over Japan (3/9/1945, in the Continental style), and his personal keynumber (13, changed to 20 in 1956). The latter three keys generated the keys for two transpositions and the coordinates of a straddling checkerboard through a process that was complicated but that possessed a kind of tractive logic, was meant to be memorized, and probably would be after two or three run-throughs.