Skill UI

This skill provides a comprehensive guide on implementing AES-256-GCM, a robust symmetric block cipher, for protecting sensitive data at rest. It covers best practices including secure key derivation (using PBKDF2 and Argon2id), proper management of initialization vectors (IVs) and nonces, and utilizing authenticated encryption to ensure data integrity and detect tampering.

This playbook provides expert-level techniques for cryptanalysis of symmetric encryption. It details how to exploit weaknesses in various modes and algorithms, including CBC padding oracle attacks, ECB mode exploitation, bit flipping attacks, stream cipher key reuse, and meet-in-the-middle attacks. Essential for authorized penetration testing and CTF challenges.