These techniques are fundamental skills for a cyber security specialist at GCHQ This starts with the main image on the canyoucrackit. To solve this stage it is necessary to identify that this is code that can be run by an Intel x86 compatible processor.
After analysis, it is clear that this machine code implements the RC4 decryption algorithm, and is able to decrypt a block of data that is hidden inside the PNG file, in a comment tag. Once decrypted, this data reveals the location of stage 2 of the challenge. Solved by. To solve this stage an implementation of a simple virtual processor is required.
Some notes on the architecture are provided along with a block of data that can be analysed. While to the uninitiated the sequence appears fiendishly difficult, it is apparently less of a challenge for seasoned code-breakers. Prof Smart went as far to offer a step-by-step guide to breaking the code, and speculated that the key to crack it may date from before the digital era.
There are letters in groups of five. When asked how long it would take for him to complete, Professor Smart compared it to asking a professional tennis player to play the medieval game of real tennis. But competition is fierce, with everyone from banks to internet companies, retailers to insurance firms keen to secure the brightest maths and computer minds. In recent years, public and private-sector employers have joined forces to launch schemes like the Cyber Security Challenge, which aims to increase the number of young people entering the sector.
Applicants have six weeks to break the code and complete the treasure hunt. Winners also have the chance to win a Raspberry Pi or Google Nexus 7.
A cipher is the pattern by which real text is turned to code.
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