Cybersecurity, learned like a practitioner.
24 learning paths · 398 modules live · every lesson written by someone who has shipped the control or run the engagement. Free to start.
Latest modules
Most recent practitioner playbooks across every track. Filter by topic, level, or search in the sidebar.
Quantum + AI Threat Models — Where Quantum Computing and Machine Learning Actually Meet
Quantum AI threats: cryptanalysis acceleration, ML model extraction, defensive applications. Separating credible threat from research speculation. The realistic 2026-2030 capability landscape. Module 18.
Isogeny-Based Cryptography — SIKE’s Death, CSIDH and SQISign Future, and the Lessons for PQ Migration
SIKE was a NIST PQ finalist broken in 2022 by Castryck-Decru — the cleanest cautionary tale in modern cryptography. Post-mortem, the surviving isogeny schemes (CSIDH, SQISign), and what to monitor going forward. Module 17.
Lattice Cryptanalysis — LLL, BKZ, Sieving, and the Best Attacks on ML-KEM and ML-DSA
Lattice cryptanalysis is what determines our long-term confidence in ML-KEM and ML-DSA. LLL polynomial-time approximation, BKZ block reduction, sieving algorithms, quantum lattice attacks. Where research could change the calculus. Module 16.
Quantum-Safe Blockchain — Bitcoin BIP-360, Ethereum PQ Roadmap, and the Custodial Migration Plan
Bitcoin and Ethereum both fall to Shor when CRQC arrives. BIP-360, Ethereum account abstraction for PQ signing, custodial implications, the lost-key coin recovery question. Module 15.
Post-Quantum PKI — Migrating Internal CAs, Certificate Hierarchies, and Trust Stores
Migrating PKI to PQ is the most operationally complex part. Algorithm choices per layer (root SLH-DSA, intermediate ML-DSA, leaf ML-DSA), parallel hierarchy strategy, EJBCA/Vault/step-ca tools, trust-store distribution. Module 14.
Crypto-Agility Engineering — Designing Systems for Algorithm Replacement Beyond Post-Quantum
Crypto-agility makes algorithm changes routine. Pluggable algorithm registries, multi-algorithm certificates, hybrid signatures, automated key rotation. The patterns and anti-patterns. Module 13.
Side-Channel Attacks on Post-Quantum Implementations — Kyber Timing Leaks and Constant-Time Defences
PQ algorithms are quantum-resistant but vulnerable to classical side-channel attacks if implemented carelessly. Documented Kyber/Dilithium timing leaks, constant-time defences, and how to verify your PQ libraries. Module 12.
Migrating to Post-Quantum Cryptography in Production — TLS, SSH, JWT, S/MIME (24-Month Playbook)
Operational playbook for enterprise PQ migration: cryptographic inventory, hybrid pilot, vendor coordination, JWT/SSH/PKI rollout phases. The 24-month engineering plan. Module 11.
Quantum Key Distribution (QKD) — Hype vs Reality, and Why PQ Cryptography Wins
QKD uses photonics for physics-based key exchange. Marketing pitches it as uncrackable. Reality: dedicated fibre, expensive, doesnt authenticate, and ML-KEM solves the same problem cheaper. When QKD makes sense (rarely). Module 10.
Hybrid PQ Deployment — TLS, SSH, IPsec, S/MIME with Classical + ML-KEM Together
Run classical (X25519) + post-quantum (ML-KEM-768) in the same handshake. Adversary needs both to break. Concrete configs for nginx, OpenSSH, strongSwan, Cloudflare. Migration checklist. Module 9.
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