Sorry if there is a problem with my link. It works for me. Perhaps you are on an NSA blacklist
. Here is part of the abstract:
[FONT=Times New Roman, serif]
In 1939 the Germans found evidence including decrypts, that a[/FONT]
[FONT=Times New Roman, serif]Polish cryptanalytic organization, WICHER, had been reading the[/FONT]
[FONT=Times New Roman, serif]ENIGMA. Documents and interrogations did not reveal how the machine[/FONT]
[FONT=Times New Roman, serif]could have been read, and after some changes in the indicator[/FONT]
[FONT=Times New Roman, serif]system and plugings, the matter was dropped. In 1943, further evidence[/FONT]
[FONT=Times New Roman, serif]of prewar Polish success, and the strong appearance that Navy[/FONT]
[FONT=Times New Roman, serif]ENIGMA was being read by the British and US, caused a cryptosecurity[/FONT]
[FONT=Times New Roman, serif]crisis. A spy in the U.S. Navy Department reported the reading[/FONT]
[FONT=Times New Roman, serif]of U-boat keys. ENIGMA security was studied and many changes in[/FONT]
[FONT=Times New Roman, serif]the machine and its usage were undertaken. By 1944 the Germans[/FONT]
[FONT=Times New Roman, serif]acted and spoke as if they knew ENIGMA traffic was being read by the[/FONT]
[FONT=Times New Roman, serif]Allies, but they suspected betrayal or compromise of keys.[/FONT]
[FONT=Times New Roman, serif]
In 1939 the Germans found evidence including decrypts, that a[/FONT]
[FONT=Times New Roman, serif]Polish cryptanalytic organization, WICHER, had been reading the[/FONT]
[FONT=Times New Roman, serif]ENIGMA. Documents and interrogations did not reveal how the machine[/FONT]
[FONT=Times New Roman, serif]could have been read, and after some changes in the indicator[/FONT]
[FONT=Times New Roman, serif]system and plugings, the matter was dropped. In 1943, further evidence[/FONT]
[FONT=Times New Roman, serif]of prewar Polish success, and the strong appearance that Navy[/FONT]
[FONT=Times New Roman, serif]ENIGMA was being read by the British and US, caused a cryptosecurity[/FONT]
[FONT=Times New Roman, serif]crisis. A spy in the U.S. Navy Department reported the reading[/FONT]
[FONT=Times New Roman, serif]of U-boat keys. ENIGMA security was studied and many changes in[/FONT]
[FONT=Times New Roman, serif]the machine and its usage were undertaken. By 1944 the Germans[/FONT]
[FONT=Times New Roman, serif]acted and spoke as if they knew ENIGMA traffic was being read by the[/FONT]
[FONT=Times New Roman, serif]Allies, but they suspected betrayal or compromise of keys.[/FONT]