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.
Regulation and Compliance: KYC and AML in Web3 (Risk-Based CDD, KYT and Travel-Rule Concepts) KYC and AML in Web3 is not just paperwork. It is a production system that identifies customers, monitors flows, prevents sanctions exposure, and keeps your product usable without turning into a surveillance machine. This guide explains how to build a risk-based […]
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Multi-sig Wallets and MPC: Shared Control Without Single Points of Failure Multi-sig and MPC solve the same human problem in different ways: one keyholder should not be able to drain a treasury, push an upgrade, or sign away an entire business by mistake. A multisig makes policy visible and enforceable on-chain. MPC splits signing power
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Decentralized Identifiers and Verifiable Credentials (Complete Guide) Decentralized identifiers (DIDs) are key-controlled identifiers that resolve to a DID document with verification methods and optional service endpoints. Verifiable credentials (VCs) are signed claims you can store in a wallet and present when needed, ideally with selective disclosure and offline status checks. This guide explains the mental
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NFT Risks and Scams: What to Watch and How to Defend From fake mints to approval drainers, signature tricks, and metadata rugs, here is a practical, user-level defense guide with concrete checks and recovery steps. TL;DR: Most losses begin with social engineering. Drainers either (1) make you grant setApprovalForAll to their operator, or (2) trick
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Using Hardware Wallets: Setup, Passphrase & Best Practices Lock down your keys the right way, from first unbox to recovery rehearsal. TL;DR: Buy from official channels, initialize on-device, record the seed offline, consider a passphrase, verify addresses on-screen, and test a recovery before storing real value. In this lesson Unbox & supply-chain safety On-device setup
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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
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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
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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
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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 »
