Interactive Applets

Browser-only explorations for the post-quantum half of Kryptografia kwantowa i postkwantowa. Pure HTML+JS — no install, no server.

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Week 1 — PQC Landscape & Knapsacks

LLL

Merkle–Hellman + LLL Break

Generate a low-density Merkle–Hellman public key, encrypt a message, then run LLL on the Lagarias–Odlyzko lattice and watch it recover the plaintext bit-vector in real time.

Ch 46 & 40

Weeks 2–4 — Lattices

Lattice Explorer

Visualize 2D lattice bases and their LLL reduction. Drag basis vectors, see the Hadamard ratio update, and watch how a "good" basis emerges from a "bad" one. Reused from the cryptanalysis course.

Ch 40

Week 6 — Hash-Based Signatures

Lamport & Merkle Visualizer

Generate Lamport one-time signature keys, sign a message, watch verification proceed bit by bit. Then build a Merkle tree, sign the $j$-th leaf, and inspect the authentication path.

Ch 47

Week 7 — NTRU, Multivariate, Isogeny

NTRU

Toy NTRU Explorer

Set $(N, p, q)$, sample short ternary $f$ and $g$, compute the public key $h$, encrypt a small message $m$, and decrypt. Inspect each polynomial step by step.

Ch 48

Week 8 — Standards & Deployment

NIST PQC Standards Dashboard

Side-by-side parameter sets for ML-KEM, ML-DSA, Falcon, SLH-DSA, McEliece, HQC. Filter by security level, sort by key size or signature size, and compare against classical baselines.

Ch 44
RSA

RSA Explorer

Classical baseline: keygen, encrypt, decrypt, sign, verify. Reused from the cryptanalysis course. Use it to compare key sizes and operation timings against PQC schemes.

Ch 25 (upstream)
Built for Kryptografia kwantowa i postkwantowa • UAM • Spring 2026