The indicated coordinates are not the final cache location!

Origin of the Enigma Machine:

With the rise of wireless communication, early 1900, the need for secure communications for both military as civilian use became essential. The search to replace the unpractical and time-consuming hand ciphers started. In 1917, the American Edward Hugh Hebern developed a cipher machine with rotating disks, each disk performing a substitution cipher. Hebern's idea was the base for many similar machines, developed in several other countries.

In 1918, Engineer Arthur Scherbius patented a cipher machine using rotors. The German Navy and Foreign Office were approached, but were not interested. In 1923, the rights for the patents went to Chiffriermaschinen-AG, a firm with Scherbius in the board of direction, that commercialized the machine. In 1927, Scherbius bought a patent from 1919 of a similar machine from the Dutchman Koch, to secure his own patent, approved in 1925.

The first cipher machine, Enigma A, came on the market in 1923. It was a large and heavy machine with integrated typewrite and weighed about 50 Kg. Soon after, the Enigma B was introduced, a very similar machine. Weight and size of these machines made them unattractive for military use. The development of the reflector, an idea of Scherbius' colleague Willi Korn, made it possible to design the compact and much lighter Enigma C. Also, the type writer part was replaced by a lamp panel. In 1927, the Enigma D was introduced and commercialized in different versions, and sold across Europe to military and diplomatic services.

Military Versions:

In 1926, the commercial Enigma was purchased by the German Navy and adapted for military use. They called it Funkschlüssel C. In 1928, the German Abwehr (Secret Service), Wehrmacht and Luftwaffe bought their own version, the 12 Kg light Enigma G, also called Zahlwerk Enigma due to it's counter on the front panel. This model had a gear box to advance the rotors, a rotating reflector, but no plugboard. The Wehrmacht revised this machine, adding the plugboard and a different rotor advancing mechanism. This version, the Enigma I, became known as the Wehrmacht Enigma and was introduced on large scale the German Army and public authorities. The Luftwaffe followed in 1935 the Wehrmacht. The Wehrmacht Enigma came initially with three rotor. From 1939 on, they were equipped with five rotors.

In 1934, German Navy took over the Wehrmacht model, with it's securer plugboard and extended the set of rotors to eight. The Navy machine was called Funkschlüssel M or M3. In 1941, although reassured by the Abwehr that the Enigma M3 was unbreakable, Admiral Karl Dönitz insisted on improvement of the Kriegsmarine Enigma. Early 1942, the famous four rotor M4 model was introduced in the Kriegsmarine. An estimated total of 100,000 machines were produced. More technical details can be found. More information on the procedures for encoding messages with Enigma can be found .

Breaking the Code:

In 1932 Poland's Biuro Szyfrow (Cipher Bureau) started attempts to analyse and break the Enigma messages. Although the chief of this Bureau received copies of codebooks, sold by the German spy Hans-Thilo Schmidt, he did not give them to his codebreakers. He thought that keeping this information from them might stimulate their efforts. Marian Rejewski, Henryk Zygalski and Jerzy Rozicki succeeded in breaking the Enigma codes and developed an electro-mechanical machine called the Bomba, to seed up the codebreaking procces. A major security flaw in the German Enigma procedures was the global groundsetting and the twice encodes message-key, this to exclude errors. This opened the door to cryptanalysis. In 1939 the Bureau was no longer able to break the codes due to increased sophistication in the design, new procedures and lack of funds for the code breakers. When Germany invaded Poland, the Polish knowledge and several replica Enigma machines were passed to French and British intelligence.

German Naval Forces, “Die Kriegsmarine”:

The German Kriegsmarine was very successful in applying their Rudeltaktik or "Wolfpack Tactics" with U-boats. They hunted individually for convoys. If a convoy was spotted, they shadowed it and called other U-boats into battle. Once all U-boats on the spot, they sunk the convoy with a closely co-ordinated attack. This technique was so devastating to the allied supplies that it almost decided the outcome of the war. Communication was the keyword and the U-boats used Enigma to send messages to co-ordinate their attacks. After some initial hard times, Bletchley Park broke the naval codes almost contineously. Decreasing effectiveness of his U-boats made Admiral Donitz suspicious and, although reassured by German intelligence that Enigma was secure, insisted on improving the Enigma's security. Early in 1942 The famous 4-wheel machine was introduced in the Kriegmarine and the complicated 'Shark' codes caused a big crisis at Bletchley Park. The Kriegmarine referred to the spring of 1942 as the "Happy Times" because the Allied forces were unable to decipher the codes and the U-boats were able to continue sinking ships without much interference.

Your Mission:

The Allied Forces have intercepted the following Morse Code message regarding a stranded Naval Enigma M4.

08.20.20.16.://21.19.05.18.19.04.15.20.20.05.12.05.14.05.20.04.15.20.02.05./04.04.15.20.18.09.10.13.05.14.01.14.20.19/05.14./05.09.07.13.01/08.20.13.14

Retrieve the secret Naval M4 and use the following setting “Grundeinstellung”.

Select B small and set Rotor “Walzen” to Beta C-03, I A-01, II G-07 and III E-05

Decrypt the intercepted text.

VEZP VFEB MUAG VTCQ OIBK JVXE ZEOA AOND JAPO PJCI BLYS VHVX DENK EKHV GCYZ NKEI HSSV RDGU XWUH TWCH AFTL WHUY EBUW OEVX NZNH YJVX DYMA PDDL DKSS QVXW VNZC PLMR YPOT BUW

This is not too difficult, go out and get the cache!