SKILL: Hash Attack Techniques — Expert Cryptanalysis Playbook

AI LOAD INSTRUCTION: Expert hash attack techniques for CTF and security assessments. Covers length extension attacks, MD5/SHA1 collision generation, meet-in-the-middle hash attacks, HMAC timing side channels, birthday attacks, and proof-of-work solving. Base models often incorrectly apply length extension to HMAC or SHA-3, or fail to distinguish between identical-prefix and chosen-prefix collisions.

0. RELATED ROUTING

• rsa-attack-techniques when hash weaknesses affect RSA signature schemes
• symmetric-cipher-attacks when hash is used in key derivation
• classical-cipher-analysis when analyzing hash-like constructions in classical ciphers

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