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BlockSec Has Closed the Seed Funding Raising

December 28, 2021
1 min read

We are glad to announce that BlockSec has closed the seed funding raising that was led by Fenbushi Capital, with participation from A&T Capital, Qulian, Impossible Finance, Incuba Alpha and NEAR MetaWeb Ventures.

Founded in 2021, BlockSec has served over 50 clients and has protected over thousands of millions worth of digital assets in this year. It has the online transaction virtualization system for both BSC and Ethereum (https://tx.blocksecteam.com) and Flash Loan monitoring system (https://versatile.blocksecteam.com/flashloan) for both Ethereum and Cronos.

The BlockSec Team focuses on the security of the blockchain ecosystem, and collaborates with leading DeFi projects to secure their products. The team is founded by top-notch security researchers and experienced experts from both academia and industry. They have published multiple blockchain security papers in prestigious conferences, reported several zero-day attacks of DeFi applications, and released detailed analysis reports of high impact security incidents.

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Zcash Orchard Soundness Bug Analysis | BlockSec Weekly
Security Insights

Zcash Orchard Soundness Bug Analysis | BlockSec Weekly

During the week of June 1, 2026, a critical soundness vulnerability was publicly disclosed in Zcash's Orchard shielded pool circuit, caused by a missing equality constraint in the halo2 ECC scalar multiplication gadget that could have enabled undetectable counterfeiting of ZEC within the Orchard pool through double-spending. The vulnerability, which existed for over four years since Orchard's activation in May 2022, was discovered by an AI-assisted security audit and patched through an emergency network upgrade (NU6.2). This single-event report covers the technical root cause (under-constrained ZK circuit relation), the AI-assisted discovery by researcher Taylor Hornby using Anthropic's Opus 4.8 model, the emergency response timeline, and the broader implications for the ZKP ecosystem.

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