CTF Challenge 1 – D-Day Invasion Breach
Overview
The Allied forces are on the brink of launching the largest amphibious assault in history—D-Day. However, concerns are mounting that German intelligence may have intercepted critical operational details.
At Bletchley Park, British codebreakers have intercepted a suspicious email that could jeopardize the entire mission. The message appears to be from an American military officer stationed in London, addressed to an unknown recipient in Berlin. While the content seems innocuous, intelligence analysts suspect it contains an encrypted communication between a double agent and the Nazi Abwehr.
The email includes an attachment and a coded message that, at first glance, appears harmless. However, experts believe sensitive information may be hidden within—concealed using cryptographic techniques, steganography, or other covert methods.
Your Mission
- Analyze the intercepted email.
- Extract and examine the attached file.
- Investigate potential hidden messages.
- Decrypt any concealed communication before the Nazis gain access to vital intelligence.
Challenge Details
- The attachment will be released on March 3, 2025.
- Solution updates and discussion forum analysis will be available until March 14, 2025.
- Completing this challenge unlocks CTF Challenge 2.
Watch Solution
CTF Challenge 2 – Operation Silent Echo
Overview
Allied cryptographers have captured a distorted radio transmission originating from the French coastline. Early analysis suggests it might carry hidden instructions to sabotage communication lines before the next offensive.
The transmission appears to use layered encryption — possibly Morse-encoded data within an audio frequency signal. Your task is to decode this multi-layered puzzle.
Your Mission
- Analyze the intercepted radio wave recording.
- Identify hidden patterns or embedded ciphertext.
- Reconstruct the complete message to prevent misinformation.
Challenge Details
- Audio signal available from March 10 2025.
- Decoded message submission deadline: March 20 2025.
- Completing this unlocks Challenge 3 – “Echo Breaker”.