Roamer.com

To celebrate the rebuilding of the WWII code breaking machine Colossus, the National Museum of Computing is running a challenge. During 15th and 16th November, historic Lorenz SZ42 ciphertext will be transmitted by radio amateurs at Heinz Nixdorf MuseumForum in Paderborn, Germany at the following times and frequencies preceded by a preamble in RTTY. The preamble message, which contains information needed to receive the SZ42 transmission is here. The ciphertext will be received by two teams of amateur codebreakers at Bletchley Park. The first will comprise members of the Milton Keynes Amateur Radio Society operating amateur radio station callsign GB2BP and using modern equipment. The second team will use the same type of equipment as used in the intercept (more…)