base base base-TRABODA-Cryptography-CTF write up

Traboda is a great platform for doing CTF challenges of different difficulty levels and a very good platform for beginners to learn more concepts and ideas on different categories of CTF challenges. Easily accessible and user-friendly site and help us to sort out area of our interest.

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There are different categories of Challenges such as :

1. Android
2. Cryptography
3. Forensics
4. Misc
5. Pwn
6. Reverse Engineering
7. Steganography
8. Web Exploitation

Here is the brief write-up of the challenge — base-base-base

This challenge falls under Cryptography Category and is of Beginner Difficulty level.

The challenge contains an attached text file, that contains a base64 string. From this we have to find the flag. Since the name of the challenge suggest base, this challenge is related to base decryption.

The given base64 string from the text file attached is decoded and we can see a base32 string obtained. Now decode this base32 string to hex string using base32 to hex converter. The obtained hex string is again decoded but again a hex string is obtained , so this hex string to ASCII conversion gives the flag.

Step-1 (base64 to base32)

Step-2 (base32 to hex)

Step-3 (hex decoder)

Step-4 ( hex to ASCII )

Now the flag is obtained.

base-base-base - Cryptography Challenge | Traboda - Learn CyberSecurity & Hacking