復号鍵も渡したんだし、これで誰でもメッセージを読めるよね！
注: この問題は TSG LIVE! CTF の過去問であり、フラグのフォーマットは TSGLIVE{...} です。フラグのフォーマットはフラグ提出フォームのプレースホルダーからも確認できます。
size limit
Topic: [Mirror] TSG LIVE! CTFReleased: Dec 7, 2025
A CTF challenge series with fun puzzles to enjoy every day
We regularly publish simple, beginner-friendly or educational CTF challenges!
Solve each challenge within its time window to appear on the leaderboard.
Discussion with friends or AI is welcome (account sharing is prohibited).
Sharing solutions is allowed only after the challenge period has ended.
Try the first challenge
Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.
tchentchen
arkWant a harder challenge?
Go to B-SIDEWriteups