A full-spectrum, browser-based cryptography laboratory covering modern, classical, and post-quantum systems.

This repo will house the source code for my Team's term wide game dev project for the CIS 410: Intro to Game Programming course at the University of Oregon.

Browser-based protocol composition safety demo — MAC-then-Encrypt vs Encrypt-then-MAC, padding oracle attack, CRIME, and the composition failures that drove TLS 1.3. No backends. No simulated math.

Browser-based PKI demo — X.509 certificate chains, trust store validation, CA compromise cascades, Certificate Transparency with Merkle inclusion proofs, and post-quantum migration to ML-DSA.

Browser-based E91 QKD demo — entangled-pair measurements, CHSH Bell test, key from aligned bases. |S|≈2.83 means secure; an eavesdropper drags it below 2 and is caught. Ekert's entanglement-based answer to BB84

Browser-based AES-GCM vs AES-GCM-SIV comparison — live nonce reuse attack showing keystream XOR recovery and GHASH key extraction, synthetic IV construction visualizer, and side-by-side misuse-resistance comparison. RFC 8452. Part of crypto-lab.

Browser-based Shor's algorithm simulation — modular exponentiation period finding, QFT probability distribution, continued fractions, factor extraction. The reason RSA, ECC, and Diffie-Hellman need replacing. No backends. No simulated shortcuts — the number theory is real.

Browser-based demo of three papers on ML-KEM's FO re-encryption check as side-channel oracle: masked comparison leakage (Hermelink 2024/060), imperfect DF-oracles with adaptive LDPC decoding (Guo-Nabokov-Johansson 2026/070), and NTT+CRT RNR blinding that holds under SCA and fault (Duparc-Taha 2025/181). The mirror…

Browser-based commitment scheme demo — hash commitments, Pedersen commitments, binding and hiding properties, sealed-bid auction, and homomorphic addition. The primitive beneath ZKPs, MPC, and VSS.

Browser-based Merkle tree and inclusion proof demo — build trees up to 16 leaves with real SHA-256, generate O(log n) membership proofs, tamper any leaf and watch the root change, with Git, Bitcoin, and Certificate Transparency walkthroughs. Part of crypto-lab.

Browser-based demo of the Double Ratchet Algorithm — the cryptographic protocol powering Signal, WhatsApp, and Google Messages. Live conversation with forward secrecy, break-in recovery, and key compromise simulation.

Browser-based demo of Shamir's Secret Sharing — split a secret into n shares, reconstruct from any k. Polynomial curve visualization, information-theoretic security proof, and AES key protection. Invented by Adi Shamir (Weizmann Institute, Israel) in 1979.

Browser-based LMS/HSS stateful hash-based signatures (NIST SP 800-208) — 32-leaf W-OTS+ key state grid, sign messages one at a time, live one-time key reuse attack with real forgery demo, HSS hierarchical tree explainer, and CNSA 2.0 firmware signing context. Part of crypto-lab.

Browser-based demo of SLH-DSA (SPHINCS+), a hash-based post-quantum digital signature scheme standardized as NIST FIPS 205

Browser-based blind signature demo — Chaum RSA blind signatures, Schnorr EC blind signatures, anonymous e-cash, private voting, and unlinkability proofs. No backends. No simulated math.

Browser-based J-UNIWARD JPEG steganography demo — Daubechies-8 wavelet cost, full STC (h=12, 4096-state Viterbi), PBKDF2+HKDF key schedule, adaptive payload embedding, live steganalysis comparison. No backends. No simulated math.

Browser-based ring signature demo — LSAG signatures, key image linkability, double-spend detection, group signatures with manager opening, and Monero transaction privacy. No backends. No simulated math.

Browser-based SHA-256 vs SHA3-256 vs BLAKE3 internals — live avalanche analysis, Merkle-Damgård/sponge/tree construction diagrams, and timing benchmarks. Part of crypto-lab.

Browser-based Poly1305 MAC demo — polynomial evaluation over GF(2¹³⁰−5), constant-time tag verification, key-reuse attack visualizer, and Polynomial Stepper. Part of crypto-lab.

Browser demo for ML-KEM (CRYSTALS-Kyber), the post-quantum key encapsulation mechanism standardized as NIST FIPS 203 in August 2024.