Crypto on Re4perZ3dhttps://re4perz3d.github.io/tags/crypto/Recent content in Crypto on Re4perZ3dHugoenMon, 10 Nov 2025 00:00:00 +0000Securinets Beginner CTF — Vigenèrehttps://re4perz3d.github.io/writeups/securinets-beginner-ctf-2025/vigenere/Mon, 10 Nov 2025 00:00:00 +0000https://re4perz3d.github.io/writeups/securinets-beginner-ctf-2025/vigenere/A classical-cipher challenge: a known-plaintext attack on a Vigenère-encrypted flag to recover the key and decrypt the message.