
Web3 Security Researcher @DefendersAudits | 🦅 @CodeHawks Eagle @Cyfrin | 100+ H/Ms Identified | 🇧🇬
Joined April 2024
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We at @ChDefendersEth are proud to announce that we finished at number 5 in the @soon_svm contest.
We managed to find a solo high vulnerability. Thank you @cantinaxyz for this opportunity!
Check this project out!
Audited by @DefendersAudits btw 🤝
Meet "the yen, onchain."
Most of onchain finance runs on the dollar.
JPY DeFi gives the yen its own rails.
Mint it against $ETH, @LidoFinance 's $wstETH, and $USDC permissionlessly.
For traders, builders, researchers & funds.
app.jpydf.com/
Most audits still stop at the contract.
The bug that actually drains you is usually one layer outside it. A signer that got shown the wrong payload. An upgrade that looked fine until storage moved. A helper contract nobody re-read after the last change.
We keep finding those at @DefendersAudits. Not because the code is ugly. Because the path around it is.
If your review ends when the functions look clean, you’re only half done.
Bitget just lost ~$387M and the interesting line is not the dollar figure.
Private keys, they say, were not stolen. Attackers hit the wallet backend, spoofed the transaction data, and let the exchange’s own authorization flow sign the lie. Same week: another bridge drained, another casino wallet emptied.
We spent years arguing about key custody. The new failure mode is quieter. The signer is intact. The thing it was shown was not.
If your security model ends at “who holds the key,” you are reviewing last year’s incident.
Robinhood Chain just put tokenized NVDA/AAPL, 24/7 markets, and AI agents with wallets on an Arbitrum L2 with a centralized sequencer.
H1 2026 security numbers still say half of all losses come from keys, phishing, and ops - not the contracts the auditors actually reviewed.
The interesting part isn’t the new chain. It’s what happens when TradFi distribution, RWAs, and agentic trading hit the same attack surface we still haven’t fixed. 🤔
Let’s revive web3sec X!
Currently getting into @RobinhoodCrypto and I’m amazed at how bullish the community is!
What are some upcoming protocols that might change the game?
0x539.eth retweeted
A visual study of our mission - protecting decentralized systems through rigorous smart contract audits, deep security research, and uncompromising standards.
We operate across Web3 to identify vulnerabilities before they become exploits, bringing structure, clarity, and resilience to complex protocols.
Security is not optional. It is the foundation.
🤖 Made with AI
Two years passed just like that. Happy to be in this space, alongside @PeterSRWeb3 against all black hats!
We are just starting, this was just the tutorial 🤫
Two years since I watched my first Web3 security video from PatrickAlphaC (@PatrickAlphaC).
That single video completely shifted how I viewed smart contracts — it opened my eyes to the critical importance of security and sparked my deep dive into auditing. 🤿
Two years later, the difference is night and day! 🔥
There have been so many supply chain attacks recently…
Maybe @DefendersAudits we have a solution? 🤫
0x539.eth retweeted
Chain Defenders solved web3 security! We were able to make an AI auditor so good that we overtook the first 4 spots on Immunefi in a day. On top of it all it costs almost nothing to do a full audit. If you are interested in how we did that - read till the end…
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Happy 1st of April to all of you!
Time to turn some black hats white again 🎩
I’m not joking when I say that we see deploy scripts using plain text private keys almost every day…
I already have a templated finding that I just add to a report once I see such instance. Please please please… protect your private keys and don’t store them in plain text 😬
We are looking for a full-time or part-time Business Developer for @DefendersAudits.
The role involves finding potential audit leads and connecting them with the audit team.
If you know someone suitable for this position, feel free to contact me here or on TG @ eth0x539.
If not, please repost to help spread the word!
0x539.eth retweeted
once the market starts going up, its gonna get crazy.
given how much AI has reduced dev costs (both web2 and web3), we're gonna see enthusiasts launching vibecoded and vibeaudited protocols left and right.
everyone's going to be a founder and everyone will feel euphoric. hacks will be happening on a daily basis.
interesting times are ahead of us.
0x539.eth retweeted
Q) How can I learn to use @Certora Formal Verification?
1⃣ @CyfrinUpdraft Assembly & Formal Verification course (updraft.cyfrin.io/courses/fo…)
2⃣ Find Highs Using Certora Formal Verification (dacian.me/find-highs-before-…) together with my repo (github.com/devdacian/solidit…) which has simplified examples based on real code & bugs from our private audits
3⃣ @RareSkills_io Certora Book (rareskills.io/tutorials/cert…)
4⃣ @alexzoid FV Resources (github.com/alexzoid-eth/fv-r…)
All are 100% free so if you want it, go get it!
0x539.eth retweeted
Defense doesn’t stop on one platform.
We’re also on LinkedIn.
Join Chain Defenders and stay ahead of web3 threats.
Follow us here: linkedin.com/company/chainde…
Happy new year to everyone! Wish you a more secure year with much less vulnerabilities in live protocols! 🎅
“Security is what matters the most in the end.” - won’t get tired of repeating that!
We didn’t secure all of Web3 in 2025.
Not even close.
Protocols still got hacked.
Bad code still shipped.
Attackers still won — sometimes.
But at Chain Defenders, we pushed the line forward:
• Found critical bugs before they were exploited
• Stopped rushed launches from becoming post-mortems
• Raised the bar for what a “real audit” should look like
Securing all of Web3 isn’t a 1-year goal.
It’s a long fight.
2026 → same mission.
Less noise. More defense.
🛡️ Chain Defenders
0x539.eth retweeted
🎄🔒 This Christmas, give your code the gift of security
Upload your .sol or .rs file to Defender One and let our AI-driven audit catch vulnerabilities before your code reaches production.
✨ What’s under the tree?
• AI-powered vulnerability detection
• Gas-optimization insights
• Downloadable reports in JSON or Markdown
🎁 And the best part?
Defender One is always free — and will always be.
Build with confidence this holiday season.
chaindefenders.xyz/defender-…













