hamayanhamayan https://blog.hatena.ne.jp/hamayanhamayan/ はまやんはまやんはまやん https://blog.hamayanhamayan.com/ Security [cry] Very Serious Cryptography [cry] basic sums [cry] Not-so-complex multiplication [cry] Very Serious Cryptography 以下のようなAES-CBCで復号化をするスクリプトが与えられる。 from Crypto.Cipher import AES from Crypto.Util.Padding import pad import os with open("flag.txt", "rb") as f: flag = f.read() key = os.urandom(16) # E… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.hamayanhamayan.com%2Fentry%2F2025%2F03%2F10%2F093739" title="KalmarCTF 2025 Writeup - はまやんはまやんはまやん" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2025-03-10 09:37:39 rich https://blog.hamayanhamayan.com/entry/2025/03/10/093739 1.0 100%