LIVE Latheon test chain is open. Withdrawals without a wallet, through the relayer. Try it in the demo· Faucet· Bridge· Explorer· Connect
Private by default · Verifiable on demand

Prove what's true.
Reveal only what's needed.

A privacy protocol on Ethereum-compatible testnets, built on zero-knowledge proofs.

See how it works Try the live demo
● Public prototype · testnets only · no independent audit yet
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Latest updates

What changed recently

Dated milestones, each confirmed by transactions. Full history on the roadmap.

  1. V7: fixed a flaw in all earlier pools

    An internal review found that every circuit before V7 let a crafted proof withdraw without a deposit. Reproduced with test tokens, fixed in V7 and deployed on the test chain; older pools are frozen for deposits.

  2. Larger pools: 1,048,576 deposits each

    Trees 20 levels deep instead of 8, and the relayer's fee bound into the proof (V6). Both carried over to V7.

  3. Bridge page live

    Move test LTH between Arbitrum Sepolia and the test chain from your wallet. A 100 LTH round trip was confirmed; a withdrawal takes about two hours.

  4. Relayer live on the test chain

    Withdraw to a fresh address without a wallet or gas: the chain's relayer sends the transaction. It cannot change the recipient, which the proof binds.

Full roadmap →Open the explorer ↗
Why it matters

Privacy and proof, at the same time

Public chains show everything to everyone. Privacy-only pools hide everything, so proving anything means giving up control. Latheon is built for the space in between.

Public ledger
Privacy-only pool
Latheon
Link between deposit and withdrawal
Visible to everyone
Hidden
Hidden
Prove one deposit to one chosen auditor
Only because it is public to all
Only by sharing the secret
With a zero-knowledge proof
What the auditor can do with it
—
The secret also lets them spend
Verify, nothing more

General categories, not specific products. Latheon is a testnet prototype; the Status section lists what is not done yet.

Designed for

Where selective disclosure fits

Use cases the design targets. These are not live integrations.

Private payouts

Pay many recipients from one pool without publishing a map of who paid whom.

Business payments

Keep supplier and treasury flows off the public map while settling on a public chain.

Audit on request

Prove one specific payment to an auditor or counterparty, and nothing else.

How it works

Three steps. Try them.

A small simulation of one pool. Nothing touches a chain.

simulation · illustrative hashes, not Poseidon · real V7 pools hold up to 1,048,576 deposits
Status

What works, what we fixed, what's open

Click a line for details and the source.

Full security model →Roadmap →
Deployed

Live on our own test chain

4V7 pools (current)
1our test chain
2tokens: LTH, USDG
3deprecated testnets

Honest note: the pools hold mostly our own test deposits, so the crowd you hide in is close to empty. The mechanics work and can be checked on-chain; real privacy needs real users.

Honest gas note: gas units differ by network and have changed over time. Our latest single on-chain withdrawals on V5: Ethereum Sepolia 419,919 · Arbitrum Sepolia 276,769 · Robinhood Chain 297,197 (LTH) and 306,346 (USDG). On the Latheon test chain, V7 withdrawMany of two notes with relayer fees: 625,896 gas of execution, 35,912,159 in total including the L1 data charge. We cannot yet explain the Ethereum figure, so we make no claim that L2 uses more or fewer gas units than L1; fees depend on gas price. A controlled re-measurement is planned.

All deployments →

Security note: an internal review found a flaw in every pre-V7 circuit — a crafted proof could withdraw without a deposit. We confirmed it with a test and fixed it; the current pools are V7 (withdraw_v5). The older pools (V3–V6, and the pools on the three external testnets) are frozen for deposits and kept only so existing notes can be withdrawn. Testnet only — no real funds were ever at risk. Details in STATUS.md and THREAT-MODEL.md.

Verify it yourself

Don't trust the page. Check the chain.

Live numbers read directly from each network's pool contracts, plus the code and the status document.

Latheon Testnet—deposits in the pools
Ethereum Sepolia—deposits in the pools
Arbitrum Sepolia—deposits in the pools
Robinhood Chain Testnet—deposits in the pools
Source code ↗ STATUS.md ↗ Threat model ↗
Founder

Who builds Latheon

Vladimir Smirnov

Vladimir Smirnov, founder of Latheon

Crypto lacks privacy. When every transaction is public, people and organizations can be exposed, and their data can end up in the hands of scammers. I knew a way to reduce that risk, so I started building it.

Latheon is a privacy protocol on Ethereum, built and maintained by me alone. It is live on testnets only, and the long-term goal is a Layer 2 where privacy is the default. Before this I worked as a lead auditor in a control and audit department and studied public administration. That background shaped my approach: privacy should hold up under verification. The code and tests are open, the numbers are measured, and I say plainly what is not done yet, including that there is no independent audit.

X: @ExPlurUm ↗
Follow the build

Updates, as they happen

Progress, measurements and fixes are posted on X and in Telegram.

Latheon on X@Latheon_xyzProject updates and measured numbers. Latheon on Telegramt.me/LatheonAnnouncements and questions.

Try it on a testnet.

Open the live demo Read the code