write-ups-challenges-2020-2021/scrambled_message/bliep.md

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A spy has been transmitting classified information from our agency to the enemy, we need to find out what information was transmitted. Unfortunately, the spy has scrambled his communications. Luckily, we could dump the memory of his 32 bit little endian based computer.

You get two files, scrambled_message.rkt contains a bit of code to get you started, and memory.bin contains the memory dump.

We think that the memory dump consists of a header followed by the actual data that was transmitted by the spy.

The header should consist of the message length, followed by the positions of interesting characters.

Good luck!

Files

• memory.bin
• scrambled_message.rkt

Points: 40