Holistic Security for DeFi Securing Your Smart Contracts
Secure your code pre-launch and block attacks in real-time. Safeguard both user assets and your reputation.
Find and fix critical issues in your smart contracts before you launch.
Make sure your business logic is sound and free of flaws.
Always monitor mempool and on-chain transactions for suspicious activities.
Receive instant alerts on new threats such as oracle manipulation and flash loan attacks.
Block confirmed exploits in real-time to prevent them from draining funds.
Start on-chain responses, such as pausing contracts, to neutralize active threats.
Understand complex attack vectors to gain actionable intelligence. Help you proactively harden your protocol against emerging threats.
Secure Your Protocol Across Its Entire Lifecycle
“Partnering with BlockSec has been crucial to Tokenlon's mission of preserving the openness of DeFi while leveraging technology to create a safer, more trustworthy space for all. BlockSec's cutting-edge on-chain analytics allow us to identify high-risk addresses across multiple blockchains and navigate complex global regulations with confidence. Their expertise helps us safeguard our liquidity partners and consistently deliver a seamless, reliable DeFi experience for genuine users.”
Taint Analysis in Crypto: Poison, Haircut, and FIFO Explained
Taint analysis is how investigators trace stolen crypto across a blockchain. This guide walks through the three standard methods — Poison, Haircut, and FIFO — with a worked Ethereum example and honest limits, and shows how modern fund-tracing tools apply them at scale.
~$1.35M Lost: BarnBridge, DeFiTuna | BlockSec Weekly
This weekly report covers 2 security incidents from July 13 to July 19, 2026, with approximately $1.35M in total losses on Ethereum and Solana. DeFiTuna, a Solana lending protocol, lost ~$570K because the position health check treated a zero-value position as healthy regardless of outstanding debt; the attacker used controlled swap routing and a separate low-liquidity pool to trigger this defect. BarnBridge lost ~$776K after an attacker exploited the protocol's deprecated but still-active governance system on Ethereum to pass a malicious proposal and drain user-approved USDC.
Know Your Transaction (KYT) in Crypto: What It Is and How It Differs from KYA and KYC
An explainer on how Phalcon Compliance's KYT screens each on-chain transfer for exposure and behavioral risk in real time, how it differs from KYA and KYC, and how it maps to FATF's real-time monitoring obligations for VASPs.
For 500+ clients, from Web3 leaders to global regulators
