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setodaNoteCTF - i_knew_it 120

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問題

image.png

解いてみた

ファイルを見ます。

image.png

idaの画面ですね。
暗号化のロジックはわからないです。

問題文の「このアセンブリ、見た瞬間あなただと分かりましたよ。」があやしげなのでいろいろ検索してみると「見た瞬間 暗号化」で以下のサイトが出てきました。

image.png

わからんからとりあえずこれを入力してみたら正解でした。

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