Back to Curriculum

Track 7 of 8

T6expert

Security & Production Engineering

Security & Production Engineering — Protect protocols and distribute paper via ZeroLeak.

Prevent replay attacks, distribute trust using Shamir Secret Sharing, design timelocks, and build backup RPC infrastructure so your app survives mainnet.

Modules: 3

Lessons: 11

Duration: ~7h

Prerequisites: Track 3 + Track 4

TRACK PROGRESS0% (0/11 lessons)

Capstone Project built in this track

ZeroLeak

Exam paper leak prevention system: PDF encrypted in-browser with AES-256-GCM, encryption key split using Shamir Secret Sharing, smart contract timelock.

Every lesson feeds directly into this codebase.

M6.1

Cryptographic Security Patterns

Replays, nonces, domain separations, AES encryption, and secret sharing.

Replay attacks — signing the same message twice

Capture and replay hazards. Nonce-based cryptographic guards.

AES-256-GCM — symmetric encryption in-browser

Web Crypto API. Encrypting PDFs client-side before IPFS uploading.

Shamir Secret Sharing — distributed trust

K-of-N threshold keys. Removing single-source targets.

M6.2

Application-Level Security

Smart contract rate limiting, Sybil resistance, ProxyShield WAF setups.

Rate limiting — protecting on-chain and off-chain resources

Token buckets in solidity, front-running shields.

ProxyShield — WAF + API gateway architecture

Honeypots, reverse proxies, and threat dashboards.

M6.3

Production Reliability

Fallback RPC circuits, gas escalations, contract upgrades, and audit logs.

Fallback RPC architecture

Alchemy + QuickNode failover scripts, circuit breakers.

Smart contract upgrade patterns

UUPS vs Transparent proxies. Upgradability risks.

Previous Track Zero Knowledge & Privacy Engineering [WIP]Next TrackReal-World Blockchain Systems