|Welcome to the E10 'Phonetic Alphabet Numbers'
Challenge. Below is a link to a complete transcription of an E10 transmission,
recorded at 2030BST, on June 28 1997, frequency 4880am. It features 120
five figure groups of letters, spoken phonetically during transmission.
Nothing is known about the content of E10 traffic. Each transmission sends
a variable number of five letter groups, and transmissions are heard on
a wide number of frequencies on the shortwave spectrum, 24 hours a day.
There are rumors (originating in America) attributing this station to the
secret service organization MOSSAD.
This particular transmission was unusual because during the repeat of the
message, the transmission ended before the repeat was completed.
Your task is to use whatever crypanalytic attack you can to decrypt this message. This cryptographic challenge is more daunting than the RSA challenge, because nothing is known about the algorithm used to encipher E10 transmissions. We do not even know for sure who the transmitting party is. If it is possible to decrypt some if not all of this message, using a massively networked brute force attack, we may be able to discern something about what the E10 transmissions really are, and who is responsible for them. Use whatever crypanalytic attack you can to decrypt this message. If you require more plaintext examples, email Crack HQ.
N.B. All email concerning this challenge must be PGP encrypted.
All claims to the prize must be accompanied by a full written description of how the crack was executed, along with any software that was used to achieve the crack. It must be demonstrated that the crack is a genuine mathematical soultion, since we do not have the original plaintext in our posession.
The Prize for the first person to email us a deciphered text along with the method employed in the crack will be an ancient Gold Roman coin. The Judges decision is final.