Crypto Lab
🥇 Crypto Lab · 2026 Cybersecurity Excellence Awards — Gold Winner
Teaching a course? → Course modules for instructors
Learn through play → Learning games — learn to commit to a hidden choice in Sealed Showdown, fly light pulses in Quantum Courier, build compact proof routes and catch counterfeit checkpoints in Merkle Mystery, play Key Rush to steer share-carrying bots past scanners and traps while learning the tradeoff in threshold secret sharing, or rescue beacons and reshape your vector jumps in Lattice Builder.
Interactive cryptography exhibits — demonstrations, learning games, and visual tools in your browser. Most run without accounts or backends.*
* ⚡ One deliberate exception: Blind Oracle runs a live Rust/TFHE-rs server to demonstrate real fully homomorphic encryption — its evaluation key cannot decrypt, and the browser keeps the result verdict local.
A curated collection of interactive cryptography exhibits, from classical ciphers to post-quantum schemes and zero-knowledge proofs. Demonstrations explore primitives and protocols, learning games build intuition, and visual tools help learners inspect the mathematics. Educational analogies and small-parameter experiments are distinguished from full algorithm implementations.
Live → https://crypto-lab.systemslibrarian.dev/
Research implementation records
The 31 October research review implementation links the twelve correction/enhancement findings to their source changes, tests and project PRs. The three advanced options retain their deferred status; reading depth, implementation and deployment evidence are recorded separately.
Book reading companions
Choose a route that matches your learning goal:
Each independent companion connects original activities to existing exhibits, cites its edition and sources, and states explicit coverage limits. Later constructions are distinguished from the book’s examples. No textbook passages or exercises are reproduced, and optional browser-local progress is separate for each book. See learn/README.md for source-review and edition boundaries. Schneier’s 1996 companion remains available under Historical reading below.
Protocol workshops
Two hub-hosted workshops add real cryptographic experiments: Timestamping tests signed claims, linked-history rewrites, a timestamped Merkle batch and timely evidence renewal; Fair Exchange preserves its direct and ideal-intermediary baselines, then executes a bounded Asokan–Shoup–Waidner optimistic signature exchange with a zero-intermediary honest path, recoverable evidence and compatible abort/resolve races. These independent workshops retain their original URLs and are separate from the standalone-repository exhibit count. Their sources and limitations are in learn/README.md.
Chip transaction authentication is a separate hub-hosted interactive study: approve a synthetic online card packet, change its amount, and replay it to see issuer checks. It uses an educational HMAC model rather than EMV application cryptograms or payment-network rules; its source-backed section is indexed in CATALOG.md, outside the standalone-repository count.
Learning Paths
Curated, ordered journeys through the catalog. Pick one on the live site and follow it step by step.
This is the beginning of the README. Read the rest at the original. Read the full README ↗
