Stay protected in Web3 with essential blockchain security tips. Learn how to avoid phishing scams, protect private keys, detect rug pulls, and follow best practices for using wallets, dApps, and DeFi protocols safely.
Wallet Safety 101: Daily Habits that Prevent Most Losses Seed phrases, approvals, blind signing, device hygiene, and sane wallet architecture. TL;DR: Keep a vault on a hardware wallet and a small-balance daily wallet. Never type seed phrases on websites. Review/revoke approvals. Avoid blind signing. Use bookmarks and simulate transactions. In this lesson Seed phrases & […]
Contract Risks (for Users): Re-entrancy, Upgrades, Admin Keys How to evaluate a DeFi/NFT protocol before you trust it with funds. TL;DR: Check audits, bug bounties, upgradeability, admin roles, and oracle design. Prefer protocols with timelocks, multisig governance, and public risk docs. In this lesson Re-entrancy (what to watch as a user) Upgradeable contracts & proxies
Contract Risks (for Users): Re-entrancy, Upgrades, Admin Keys Read More »
Common Attacks in Web3: Phishing, Drainers, Fake Airdrops How the most successful crypto scams actually work, and exactly how to avoid them. TL;DR: Most losses start with social engineering (DMs, emails, pop-ups). Drainers abuse token approvals or get you to sign malicious messages. Never enter a seed phrase outside your hardware wallet. Use an approval
Common Attacks: Phishing, Drainers, Fake Airdrops Read More »
Auditing & Testing: From Unit Tests to Fuzzing & Invariants Ship with confidence: rigorous tests, automated checks, and structured reviews before mainnet. TL;DR: Use Foundry or Hardhat for unit/integration tests, add fuzzing/invariant tests, run static analysis (Slither), measure coverage, and follow an audit checklist with clear threat models. In this lesson Tooling Stack Foundry Example
Auditing and Testing (Foundry/Hardhat, fuzzing, static analysis) Read More »
Smart Contract Risks: Re-entrancy, Oracles, Access Control & More Recognize top vulnerability classes and the standard defenses used in production. TL;DR: Most exploits are preventable. Use CEI, ReentrancyGuard, strict access control, safe math by default (>=0.8), and robust oracle design. Test, fuzz, and audit before mainnet. In this lesson Re-entrancy Oracle Manipulation Access Control Math/Overflow
Smart Contract Risks Re entrancy, oracle-manipulation Read More »
On-chain Privacy: Mixers, Stealth Addresses, and Compliance Intermediate Security • ~9 min read • Updated: 08/08/2025 Public blockchains are transparent by default: account balances, transfers, and contract interactions can be traced forever. That’s great for auditability but bad for personal and business confidentiality. This comprehensive guide walks through practical privacy techniques. how they actually work
On-chain Privacy: Mixers, Stealth Addresses, and Compliance Read More »
Smart Contract Risks: Re-entrancy, Oracles, Upgrades Intermediate Security • ~12 min read • Updated: 08/08/2025 Most DeFi incidents trace back to a small set of mistakes. If you can recognize these patterns in code reviews and audits, you eliminate a huge fraction of tail risk before users ever interact with your app. This guide expands
Smart Contract Risks: Re-entrancy, Oracles, Upgrades Read More »
