Caesar

Platform: CUSTOM | Category: Crypto | Type: Challenge | Difficulty: Easy | OS: N/A | **Author: XESXOR Techniques: 33-letter alphabet with ё, Russian alphabet Caesar cipher brute-force

Summary

Walkthrough of the CUSTOM Crypto Caesar. Task: decrypt a garbled Russian text encrypted with a Caesar cipher. Solution: brute-force all 33 shifts of the Russian alphabet (including ё), shift 21 produces readable text with the numeric flag.

Description

Russian Caesar cipher with shift 21 on 33-letter alphabet (with ё).

Solution

Brute-force all 33 shifts. Shift 21: 'Поздравлос! Флаг: девять восемь три один три три семь один два три!' ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍

Key Takeaways / Lessons

• Mastering 33-letter alphabet with ё, Russian alphabet Caesar cipher brute-force was key to this challenge.
• Always check for common misconfigurations and verify assumptions.

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Crafted by XESXOR Research • 2026-03-08 • CUSTOM • Caesar • Difficulty: Easy