Thi Nguyen retweeted
A look back at Hack Seasons Conference Ho Chi Minh City.
The digital asset space is expanding beyond the blockchain-native world. It’s no longer just blockchain-native builders - teams from fintech, financial services, and infrastructure are joining in, each with a different view of where the market is heading.
We saw this firsthand at the @fystack x @securosys booth, with conversations ranging from teams exploring digital assets for the first time to businesses already looking at how to integrate them into their existing operations.
Thank you @thesensedotsol team for the amazing video!
Thi Nguyen retweeted
Institutional digital assets need infrastructure that fits the way real teams operate - from wallet management and approvals to security and compliance.
See you at HSC on the 15th!
Meet @fystack at HSC Ho Chi Minh - wallet & custody built for institutions
Fystack builds wallet and custody infrastructure for payment companies, fintechs, and enterprises moving onto stablecoin rails and tokenized assets - full access to blockchain without an in-house Web3 team
What's under the hood:
🔑 One orchestration layer across every deployment - wallet lifecycle, policy engine, multi-sig approvals, full audit trails
🛡️ Keys live in an MPC quorum, a certified HSM, or both - your choice
🏦 Built for institutions: workspaces, roles, and approvals that map to how a real treasury operates
🌐 10+ blockchains supported · 20+ production self-hosted deployments
👥 Fystack shares the booth with Securosys - Swiss security hardware trusted to protect national interbank infrastructure. Two teams, one stand: catch both in one stop
Want to meet the team in person on the 15th? Book a slot in advance - reach out to t.me/poshivanik_anna
See you in Ho Chi Minh☕
Thi Nguyen retweeted
Fystack has partnered with @securosys to bring HSM-backed deployments to our custody platform for banks and institutional clients.
While MPC remains our default architecture, institutions can now choose between MPC and HSM based on their security, compliance, and operational requirements - all through the same orchestration layer for wallet management, policy controls, approvals, and audit trails.
Together, we're delivering more flexible, institutional-grade digital asset custody.
#DigitalAssetCustody #MPC #HSM
Looking forward to demonstrating secure HSM-backed custody infrastructure for fintechs and banks at HSC Vietnam.
See you there!
Banks and fintechs in Vietnam don't need an in-house crypto team to launch digital asset products
That's the case Fystack and Securosys will make live at HSC Ho Chi Minh on August 15 — a 20-minute workshop at their booth, with a live transfer demo and the actual security hardware on the table
Who's behind it
▫️ @securosys — Swiss security hardware trusted to protect Switzerland's national interbank payment system
▫️ @fystack — wallet & custody infrastructure for stablecoins and tokenized assets. Financial institutions can build on blockchain without an in-house crypto team
What it gives banks and enterprises
🔑 Private keys are generated, stored, and used entirely inside certified Securosys HSMs — they never leave the hardware
🏠 Self-hosted on-premise, with all keys, data, and operations kept under Vietnam data residency laws
⚙️ Role-based access, multi-sig approval groups, and a policy engine define who can move which assets
📋 Immutable audit trails on every action, automated AML/OFAC screening, and multi-chain support
Both teams will be on-site. If you'd like to meet the teams in person and learn more about their joint custody solution, you can book a meeting in advance by reaching out to t.me/poshivanik_anna
Register for HSC Ho Chi Minh: luma.com/HSC_HoChiMinh
Security is the foundation of any wallet infrastructure service. We are excited to work with @AdevarLabs to strengthen the security of our platform.
Audit Completed for @Fystack
Fystack builds MPC-based stablecoin payment infrastructure for fintechs, neobanks, and payment providers. Self-hosted deployment and flat pricing.
Grateful to work with the Fystack team and help them Ship Safely. 🚀
Public report & testimonial below🧵:
We’ve just wrapped up our journey in the Empower Residency Program at @UnchainedSummit 2026.
Over the past week, @fystack team has also been presenting and connecting with builders across Web3 Builder Summit and Davas 2026. It’s been an incredible opportunity to represent founders from emerging markets who are building innovative solutions for the next generation of onchain applications.
A special thank you to @sqrDAO, @Lisk, Leo, @alxs0x, @Cris7ran, @bytesbybree, @0xDankiii, @harrybui31, @TheVinhNguyen4 and all the mentors, partners, and friends who supported us throughout this journey.
We’ve met amazing people, forged valuable partnerships, and gained insights that will help shape our next chapter.
Now it's time to take @fystack to the next level: building the custody layer that enables fintechs in emerging markets to launch secure onchain applications.
Excited to be speaking at Web3 Builders' Summit: LFBUIDL 2026 (May 25 Danang, Vietnam) co-hosted by @sqrDAO and DAVAS.
I'll be presenting @fystack talking about secure custody infrastructure for the stablecoin era and what it actually takes to bring banks and fintechs on-chain.
If you're going to be in Danang that week, let's connect.
Thi Nguyen retweeted
24 exploits. $651M lost. The worst month in crypto history.
Your signing key is your biggest attack surface. April proved it.
This is not a DeFi problem. Any system where a single key authorizes critical operations has the same exposure.
If you are running custody, payment rails, or signing infrastructure, the question is not whether your keys are encrypted. It is what happens the moment one is compromised.
Full breakdown in the image below 👇
Blockchain series: Why Bitcoin is slow (and extremely hard to hack)
We look at Bitcoin and see:
~7 TPS
~10 minute blocks
no smart contracts and conclude it’s outdated.
That’s missing the point.
If you read the architecture instead of the metrics, it becomes clear what Bitcoin is actually optimizing for: making history extremely hard to change
How Bitcoin actually works (and why it feels “slow”)
1. Proof of Work (consensus)
Miners compete to find a hash below a target. No shortcuts, just computation.
Security comes from real-world energy
- Attacks are physically expensive
- 10 min blocks are intentional
Slowness = security.
2. UTXO model (state)
Bitcoin doesn’t track balances. It tracks unspent outputs.
Instead of “you have 0.8 BTC”:
- you own a 0.8 BTC output
- you spend it fully
- you create new outputs (recipient + change)
Implications:
- no shared global state
- parallel validation
- simpler failure model
Tradeoff: wallet logic is harder (UTXO selection, change, etc.)
3. Script (execution)
Bitcoin Script is deliberately limited:
- no loops
- no complex state
- not Turing-complete
This minimizes:
- attack surface
- unexpected behavior
- consensus bugs
No DeFi on L1. Just predictability.
What you get in return:
- ~60 min strong finality
- extremely high cost to rewrite history
- a system that changes very slowly
The mental model:
Bitcoin is not trying to be fast or flexible.
It’s trying to be: a settlement layer you can trust over decades
Thi Nguyen retweeted
If your company uses a third-party custody vendor, your vendor agreement probably won't protect you when something goes wrong.
New piece for legal & compliance teams at crypto exchanges, PSPs, and stablecoin operators: how liability is actually allocated across custodial SaaS, multisig, and self-hosted MPC, and what to audit before regulators ask.
→ Why your vendor contract is not a defence with regulators
→ Why shared signing turns incidents into prolonged disputes
→ What self-hosted MPC changes about your evidentiary position
→ A pre-incident legal checklist across all three models
fystack.io/blog/who-is-liabl…
Thi Nguyen retweeted
Brazil is becoming the most important crypto market in LATAM.
$318.8B. 90% stablecoin volume. And now - a proper regulatory framework.
For stablecoin operators and remittance platforms, this is the clearest green light the region has ever given.
Here's what getting in looks like 👇
fystack.io/blog/brazils-vasp…
Thi Nguyen retweeted
Asia has five stablecoin regimes in 2026, and they have almost nothing in common.
🔹 Singapore: framework finalized, issuance underway. StraitsX and Paxos already operating.
🔹 Hong Kong: legislation enacted, but no issuance yet. Still in license review.
🔹 Japan: issuance restricted to banks and trust companies only. JPYC and three mega-banks leading.
🔹 South Korea: basic law passed, secondary legislation still under discussion. Key players on standby.
🔹 China: full private ban. No pathway.
No single compliance posture works across all of them. Infrastructure built for one market will not transfer cleanly to the next.
Design for fragmentation from day one.
@fystack is built for exactly this. One API, multi-chain custody infrastructure that works across jurisdictions without rebuilding from scratch for each market.
Thi Nguyen retweeted
EMpower Founders Residency: The Official Cohort 🇻🇳
Thank you to everyone who applied. The volume and quality of builders' shipping for Emerging Markets right now are serious.
After weeks of careful due diligence and reviews of some very strong live products with @sqrDAO, we’ve locked in the final cohort.
Meet the teams joining us in the EMpower Residency:
@usevouchify
@ticketdaddy_
@jamitHQ
@poly_pay
@TideMarkets
@Gaian_hq
@fystack
@kokiodotapp
The official cohort: web3foundersresidency.com/co…
See everyone in Da Nang. Let's learn more about the teams 👇
Fystack team is continuing to ship hard on Solana
Seamless withdrawals on @solana with fully self-hostable custody infrastructure. Programmable wallets built for stablecoin payment processors, crypto payment gateways, and fintechs.
Guardrails for every withdrawal so you don’t accidentally transfer millions to a phishing address.
Check out our platform: fystack.io/
GitHub: github.com/fystack
Excited to be part of a friendly Solana vs Cardano debate on the future of blockchain for retail users and businesses.
Join us here: luma.com/2wqcgdwf?tk=CzBq6l
💥 EVENT 💥04.04.2026💥
CARDANO ⚔️ SOLANA
🚨 A deep-dive debate event exploring the differences between Cardano and Solana, designed for the blockchain community in Vietnam.
Topics: ecosystem, decentralization, transaction speed, VC dynamics, and more — all will be analyzed live at the event.
🎙 Featuring distinguished speakers:
🌟 Mr. Thi Nguyen (Flystack.io)
Founder of Fystack — an MPC Wallet solution and Web3 digital asset platform.
🌟 Mr. Bui Van Hung (Cardano)
World Mobile Ambassador in Vietnam — connecting the community and sharing valuable insights within the Cardano ecosystem.
🌟 Mr. David Le (Solana)
Contributor to SuperteamVN and SuperteamKorea — supporting project builders and fostering talent development within the Solana ecosystem.
🌟 Mr. Minh Bui (Cardano)
A highly active young contributor in the Cardano ecosystem, with experience as CR, MR, DRep, and builder in Catalyst.
🚀 REGISTER NOW: luma.com/2wqcgdwf
❤️ We sincerely thank our sponsor Cardano Catalyst and Cardano Vietnam for supporting and helping spread the value of this event to the Vietnamese blockchain community.
❤️ The Cardano vs Solana event would also like to express our gratitude to WorkFlow Space for sponsoring the venue.
❤️🔥 See you all at the event!
People often waste time debating which blockchain is the best.
There is no "best" blockchain. Each one has its own strengths and weaknesses, and most people online are too tribal to admit it.
Bitcoin is the slowest blockchain. But at the same time, it is the most secure.
That's not a coincidence. That's the trade-off.
Speed and smart contract capability come at a cost, and that cost is security. The faster and more programmable a blockchain gets, the bigger its attack surface becomes.
Think about it:
- Bitcoin → the only way you get hacked is if your private key is stolen. That's it.
- Ethereum & Solana → people lose millions every year to faulty smart contracts. One bad line of code and your funds are gone forever.
The $600M Ronin hack. The $320M Wormhole exploit. None of that happens on Bitcoin, because Bitcoin doesn't try to do what Ethereum and Solana do.
Complexity is a feature. Until it isn't.
So before you say Bitcoin is "outdated" because it only does 7 TPS - ask yourself: how much is absolute security worth to you?
At @fystack we are building open source wallet infrastructure to drive mass adoption for blockchains: github.com/fystack
Join our Telegram for Web3 engineering & security updates and discussion : lnkd.in/gg3ZSj4A
If you've been building on #Tron lately, you already know energy costs have gotten painful.
A single transfer of 1 USDT can cost 13.4 TRX (~$4.12 USD). For any platform like a crypto payment gateway or a stablecoin payment processor moving huge volume, that adds up fast.
At Fystack, our users felt it. So we built a fix.
We've integrated TronZap, an on-demand energy rental provider, directly into our withdrawal and sweep automation flows.
Here's what that means in practice:
- Rent 131,000 ENERGY in 1 our for just 5.5 TRX (~$1.69) - enough to make a USDT transfer
- Up to 60% reduction in transaction costs
- No need to run large-scale staking operations like Binance or Bybit to get free energy.
- Fully automated, no manual intervention required
Instead of locking up capital in staking just to offset fees, you rent the energy you need, when you need it. Clean, efficient, and cost-effective.
This is now live on Fystack at fystack.io
lnkd.in/gUTh_ixA
If you're managing crypto infrastructure on Tron and high energy costs are eating into your margins, I'd love to hear how you're handling it or show you how we did.
