54 41 53 4b 20 54 49 54 4c 45
Description
This numeric system is a more friendly way to represent binary numbers.
50pts
Question
Convert the values to a readable format:
476f6f64206a6f62210a54686520666c616720697320637466746563687b38333333
346163382d633065387d0a0a48657861646563696d616c206e756d6572616c732061
726520776964656c79207573656420627920636f6d70757465722073797374656d20
64657369676e65727320616e642070726f6772616d6d657273206265636175736520
746865792070726f7669646520612068756d616e2d667269656e646c792072657072
6573656e746174696f6e206f662062696e6172792d636f6465642076616c7565732
Solution
I recognised the text format as hexadecimal from the title, where they are well grouped. I entered the question code into the CyberChef program and encoded the text of the hexadecimal symbols into characters.
Hexadecimal values translated into the following format
Good job!
The flag is ctftech{83334ac8-c0e8}
Hexadecimal numerals are widely used by computer system designers and programmers because they provide a human-friendly representation of binary-coded values.
Tools
- https://gchq.github.io/CyberChef/ - Super tool to encode and decode strings
Flag
ctftech{83334ac8-c0e8}
