Cryptanalysis of the Enigma immense problem and it gave a great deal of trouble. Work on a high speed machine had been started by Wynn-Williams of the TRE late in 1941 and some nine months later Harold Keen of BTM started work independently. Early in 1942, Bletchley Park were a long way from possessing a high speed machine of any sort. Eventually, after a long period of being unable to decipher U-boat messages, a source of cribs was found. This was the Kurzsignale (short signals), a code which the German navy used to minimize the duration of transmissions, thereby reducing the risk of being
The Kingdom of the Netherlands During World War II it were televised in a documentary television series from the 1960s, "De Bezetting" ("The Occupation"), directed by Milo Anstadt. It established de Jong as a figure of national importance and a media personality. He was later chastised for being overly concerned with his own image and reputation, a critique extended to his historical work—for instance, his cursory investigation in 1965 of the activities during World War II of Claus von Amsberg, then fiancé of crown princess Beatrix, was deemed insufficient and too positive (as opposed to his investigation in 1977 of politician Wim Aantjes, in which he too easily reached