Part IV — Post-quantum cryptography
The quantum computer breaks the asymmetric foundations of everything we have seen. This part is the answer: the real threat, the math that resists, and how to migrate without betting everything on a single card.
| # | Section | What it covers |
|---|---|---|
| 1 | The quantum threat | Shor (breaks asymmetric), Grover (only weakens symmetric), "harvest now, decrypt later", the uncertain timeline. |
| 2 | The new families | Lattices/LWE, the 2024 NIST standards (ML-KEM, ML-DSA, SLH-DSA, FALCON), the lesson of SIKE. |
| 3 | The migration | Hybrid mode, ordering (KEM first), crypto-agility, deadlines, and Koder's posture. |
Previous part: III — Protocols. Next: V — Applied crypto at Koder — how the Stack uses cryptography in production.
For dense reference, see Part VIII — Reference.