Seth Steiman

GTM at @Blockaid_, previously @reflexivityres || Chicago

[Seth Steiman @SethSteiman]

I think you’re massively overestimating our influence here, where exactly do we fit into this story? Would love to clear any confusion
A little sad to see a reductive and, frankly, hateful comment from an org I’ve enjoyed interacting with in the past @kt_nowk . Have a lot of respect for the team over there

[Seth Steiman @SethSteiman]

@joinshiftX Shift

[Cointelegraph @Cointelegraph]

🚨 ALERT: Blockaid has detected an ongoing exploit on the Verus-Ethereum Bridge, with approximately $11.58M drained so far.

[Blockaid @blockaid_]

Funds stolen onchain are laundered faster than AML tooling can track. Exploits unfold in minutes, stolen funds hit mixers soon after, and existing tools weren't built to keep up.

↓ Here are 3 ways Blockaid’s Risk Exposure helps your digital asset operations enforce compliance:

[Seth Steiman @SethSteiman]

Never know what you’re gonna get at a @blockaid_ dinner

[GSR @GSR_io]

Our Head of Content and Special Projects appears to be currently occupied with a special project.

📍 Consensus, Miami

[Seth Steiman @SethSteiman]

@blockaid_ ‘s Cosigner solves this problem for 100s of partners across a number of MPC/Multisig providers.

[Squads @multisig]

We've identified an address poisoning attack targeting Squads users. We have no evidence of any users being impacted at this time.

Attack vector: Since all public keys are visible onchain, attackers are programmatically creating new multisig accounts that include existing Squads users as members. These multisigs appear in the UI because the program indexes all accounts associated with your key. Additionally, attackers are grinding public keys that match the first and last characters of your real multisig addresses, making fake accounts look legitimate at a glance.

Attacker goal: Get you to mistake a fake multisig for one of your real ones — either by copying its vault address (sending funds to an attacker-controlled account) or by signing a transaction you didn't initiate.

Impact: None, if you don't interact. This is not a protocol vulnerability. The attacker cannot access your funds, execute transactions, or modify your existing multisigs. It is purely a UI-level social engineering attempt.

Action required:

— Ignore and do not interact with any multisig you did not create or weren't added to by your team
— Do not rely on matching the first and last characters of an address to verify it — always verify the full address against your own records
— If you're unsure whether a multisig is legitimate, check with your team before taking any action
— Set your Squads accounts as default — this pins them to the top of your Squad list, making it easy to distinguish your real accounts from anything unfamiliar. We encourage everyone to do this now if you haven't already (click on ... next to your Squad in the Squad list).

UI updates shipping in the next two hours:
— A banner alerting users to this attack
— An alert on any multisig you've never interacted with before

In the next few days we are also shipping a whitelist logic where all new multisig accounts initially go to a pending state requiring you to manually add them to your Squad list.

We'll follow up here with updates as we roll these out.

[Seth Steiman @SethSteiman]

@grahamfergs @consensus2026 Meeee

[Seth Steiman @SethSteiman]

@xenowits @0xjordy @DriftProtocol @blockaid_ @MetaMask @NickSanschagrin @TheMindofMar @mikashi drift was not using Blockaid. MM flagged these addresses to us as we are the security layer embedded in MM to protect users from interacting with malicious actors/smart contracts/etc.

[Seth Steiman @SethSteiman]

@cesto_co @solana Love it. Great idea and a great team

[Seth Steiman @SethSteiman]

Come join the team! Next SKO on Mars!

[Blockaid @blockaid_]

2 years ago, it was a handful of us building. Today, Blockaid is the trusted security layer for the largest companies operating onchain.

→ SKO 2026 in Miami
→ GTM team 3X'd this past year
→ We're hiring: https://t.co/NNjnQGjsas

One team with a shared vision, having fun doing it.

[Seth Steiman @SethSteiman]

@0xzachamm @MitosisOrg Wishing you the best in your next endeavor!

[Seth Steiman @SethSteiman]

Thx for the love @BlocksterCom - happy to see this one announced and public. Would love to share more insights on this partnership for anyone interested.

[Blockster @BlocksterCom]

Security at scale 🔒

@trondao + @blockaid_ = real-time onchain protection for 12B+ transactions and 350M+ users. 👏 #Crypto #TRON https://t.co/r4HwCyFekZ

[Seth Steiman @SethSteiman]

@azeemk @ADFinanceWeek @0xMiden @Chopard @Nike @jcrew @7ForAll_KindMan Glad I wasnt the only one underdressed at that event 🤣

[Seth Steiman @SethSteiman]

@mansourtarek_ Prediction market specific security challenges. We work with Polymarket on a few of these initiatives.

[Idobn @idobn]

This is exactly what @blockaid_ is building.

Simulation & Validation coupled with cosigners to prevent signing malicious transactions

Onchain security monitoring to prevent smart contract exploits via early detection and automated response

We need to focus more on cyber security and less on KYC

[Seth Steiman @SethSteiman]

Anybody following me going to Devconnect next month? Hmu

[Idobn @idobn]

For 22 minutes, PayPal's PYUSD Issued by Paxos would not have been GENIUS-compliant.

Yesterday, Paxos, one of the most trusted and compliant players in the space, accidentally minted $300 trillion PYUSD. The total supply onchain was greater than the world’s GDP.

It was a single administrative error that exposed how easily one anomaly can affect DeFi core systems including stablecoin issuance, collateral ratios, oracles, and liquidation logic across the ecosystem.

[Seth Steiman @SethSteiman]

@d3nnychoi Heyyo - would love to connect and hear about what temple is building here. DM?

[Seth Steiman @SethSteiman]

@RicaDixuanFU @DanaBuidl @yzilabs Congrats on the raise! Would love to connect and hear about what the team is building. I think Blockaid could be of great service as a security partner as you scale

[Seth Steiman @SethSteiman]

@tomgregory100 Hey Tom, congrats on the raise today at BPN. Would love to connect and learn more about how the team is addressing security on the platform - I think Blockaid could be of massive help.