Post-quantum cryptography implementation-layer attacks — ML-KEM/Kyber side channels (KyberSlash-class timing, single-trace power/EM, template and deep-learning SCA), fault injection on decapsulation, RNG/keygen weaknesses in liboqs/oqs-provider/PQClean/pqm4, hybrid KEM combiner implementation flaws, and Kyber ransomware sample triage with implementation-defect recovery paths.