Birinchi Qadam — To'liq Yechim

Masala tahlili

Bu platforma uchun kirish masalasi. Maqsad — Base64 kodlashni tushunish.

Berilgan: TlVMTHtXM2xjMG0zX3QwX051bGxDVEZ9

Fikrlash jarayoni

Base64 qanday tanib olish mumkin?

• Faqat A-Z, a-z, 0-9, +, / belgila
• Ko'pincha = bilan tugaydi
• Uzunligi 4 ga karrali

Bosqichma-bosqich yechim

1-qadam: Base64 ekanligini aniqlash

TlVMTHtXM2xjMG0zX3QwX051bGxDVEZ9

Faqat alfanumerik belgilar va +, / — bu Base64!

2-qadam: Python bilan deshifrlash

import base64

encoded = "TlVMTHtXM2xjMG0zX3QwX051bGxDVEZ9"
decoded = base64.b64decode(encoded)
print(decoded.decode('utf-8'))

3-qadam: Natija

NULL{W3lc0m3_t0_NullCTF}

Python script (to'liq)

#!/usr/bin/env python3
import base64

# Shifrlangan matn
encoded = "TlVMTHtXM2xjMG0zX3QwX051bGxDVEZ9"

# Base64 decode
decoded_bytes = base64.b64decode(encoded)
flag = decoded_bytes.decode('utf-8')

print(f"Flag: {flag}")

Yakuniy flag

NULL{W3lc0m3_t0_NullCTF}

O'rganilganlar

• base64.b64decode() funktsiyasi
• Base64 tanib olish belgilari
• Python bytes → string konvertatsiyasi