Make digital assets post‑quantum secure today, without waiting for custodians or chains.

EternaX Vault is a post-quantum secure, crypto-agile vault for institutions and the platforms that serve their clients, on Ethereum and EVM chains. Assets leave a vault only with NIST post-quantum signatures (SLH-DSA or ML-DSA) from existing HSMs or MPC, plus a second independent approval. No one has to wait for a custodian or the chain to migrate.

Post-quantum secure means protected by cryptography designed to resist attacks from quantum computers, using algorithms standardized by NIST such as SLH-DSA (FIPS 205) and ML-DSA (FIPS 204). EternaX Vault is post-quantum secure because every payment requires these signatures and accepts no ECDSA signature, the scheme quantum computers are expected to break.

No. Ethereum accounts use ECDSA signatures and validators use BLS, both of which a large quantum computer is expected to break. Ethereum targets full post-quantum security by December 2029 as a planning goal. EternaX Vault makes assets held on Ethereum post-quantum secure now, without waiting for that upgrade.

A sufficiently powerful quantum computer could recover private keys from ECDSA public keys, which become visible on-chain after a key signs, and then forge transfers. Assets held in EternaX Vault cannot be moved that way, because the vault accepts only post-quantum signatures and a second independent approval.

Institutions can make digital assets quantum-safe today with EternaX Vault in three steps: generate post-quantum keys in existing HSMs or MPC, deploy and verify the vault, then move assets in. No custodian change, chain migration or protocol upgrade is required, and a 30-day pilot starts with a capped deployment.

Yes. With EternaX Vault, each client gets their own vault, approved by any combination of the client, the adviser and the custodian, with limits and time locks set from the platform's policy. Per-client vaults are offered through design-partner pilots.

EternaX Vault is offered to institutions and platforms, not directly to individuals. Individuals can hold assets in an EternaX Vault through a wealth manager, private bank or fintech that offers it to its clients, which also provides onboarding, support and recovery.

Bunker mode is a defensive posture proposed by Ethereum Foundation researcher Justin Drake on 7 October 2026, after warning that ECDSA could break before quantum computers arrive. Hiding public keys protects idle funds, but institutions and their clients sign constantly. EternaX Vault keeps them post-quantum secure while they keep signing, using NIST SLH-DSA approvals.

Institutions should prepare for bunker mode by listing every key that controls assets, prioritizing keys whose public keys are already exposed on-chain, and moving high-value assets and admin roles behind post-quantum approval. EternaX Vault does this without changing custodians or chains: post-quantum keys in existing HSMs, a verified vault, then a capped 30-day pilot.

In October 2026, StarkWare co-founder Eli Ben-Sasson asked publicly who is building a programmable bunker. EternaX Labs builds one for institutions: EternaX Vault, a post-quantum secure vault on Ethereum and EVM chains with programmable controls, including quorums, limits, an address book, time locks and freeze, and crypto-agility for future algorithm changes.

No. Bunker mode is a defensive posture proposed by Ethereum Foundation researcher Justin Drake on 7 October 2026, not a protocol state Ethereum has entered. The network runs normally; the proposal is that holders and institutions prepare now by protecting exposed keys, while Ethereum works toward full post-quantum security, targeted for December 2029.

No. Lido's bunker mode is a protective state in Lido's staking withdrawals, designed for adverse network events such as mass slashing. The bunker mode discussed here is the cryptographic-risk posture Justin Drake proposed in October 2026, about protecting keys before ECDSA can be broken. EternaX Vault addresses that second meaning.

EternaX Vault makes digital assets post-quantum secure now, while waiting for Ethereum leaves exposed keys at risk for years. Ethereum targets full post-quantum security by December 2029, as a planning goal rather than a guarantee, and researchers now warn ECDSA could fail sooner.

EternaX Vault works now with your existing custodian. Custodian post-quantum MPC is ML-DSA-only and still early, and on Ethereum its signatures still need an on-chain verifier to protect assets. A new custody platform means re-platforming. EternaX Vault can also accept ML-DSA MPC signers later.

No. EternaX Vault adds a vault your institution owns and does not replace your custodian, which can hold an approver key. Your counsel and custodian should confirm during the pilot that assets held in your own contract fit your existing agreements.

No. With EternaX Vault, keys stay in your HSMs or MPC, approval shares are held by your members, and assets sit in a contract your institution governs. EternaX is not a custodian.

EternaX Vault supports a setup where your qualified custodian holds approver keys in its own HSM, so nothing moves without it. Regulated funds generally must keep client assets with a qualified custodian; whether this setup meets a specific rule depends on jurisdiction and structure, so your counsel and custodian decide. EternaX does not give legal advice.

EternaX Vault runs on Ethereum and can be deployed on EVM-compatible chains, including Arbitrum One, Base, OP Mainnet, Polygon PoS, BNB Smart Chain, Avalanche C-Chain and private Hyperledger Besu networks, and it is the native wallet of EternaX Chain. Ethereum is recommended for post-quantum claims, because other chains keep their own validator and bridge security. SLH-DSA works on any EVM chain; the ML-DSA path needs the latest EVM rules, confirmed per chain.

EternaX Vault holds the native coin of each supported chain (ETH, POL, BNB, AVAX) and any ERC-20, including USDC, USDT, USDS, PYUSD, tokenized funds such as BUIDL and OUSG, WBTC, stETH, LINK, UNI and AAVE. Permissioned tokens need the issuer to allowlist the vault address.

No. Holding USDC in EternaX Vault makes your control of the tokens post-quantum secure, so no one can forge an approval to move them. The USDC contract itself is governed by Circle. Issuers can protect their own mint and admin roles with EternaX Vault for Issuers.

SLH-DSA (NIST FIPS 205) and ML-DSA (NIST FIPS 204) are post-quantum digital signature standards published by NIST in August 2024. SLH-DSA is hash-based, the most conservative assumption, and is EternaX Vault's default. ML-DSA is lattice-based with smaller signatures, and serves HSMs without SLH-DSA firmware and post-quantum MPC signers.

For EternaX Vault, HSMs with published SLH-DSA and ML-DSA support include Entrust nShield 5, Securosys Primus, Futurex, Marvell LiquidSecurity and Crypto4A. Thales Luna and Utimaco support ML-DSA, with SLH-DSA to confirm per firmware version, and Thales TCT Luna T-Series supports ML-DSA. EternaX validates each integration on your hardware during the pilot.

Yes. MPC platforms that sign with threshold ECDSA or EdDSA, such as Fireblocks, Copper or Dfns, are not post-quantum, but they can remain your approval workflow while the post-quantum key sits in your HSM. Post-quantum MPC signers that produce ML-DSA can sign EternaX Vault approvals directly.

Crypto-agility is the ability to replace cryptographic algorithms without rebuilding the system around them. EternaX Vault adds new signature schemes through a governed registry, lets approvers rotate while mixed quorums keep payments flowing, and retires weakened schemes with a security floor. The vault address, assets, quorum and audit history never change.

EternaX Vault accepts only post-quantum signatures, while multisigs such as Safe use ECDSA owners today and only count signatures. EternaX Vault also adds a second independent approval, so stolen signing keys are not enough, and changes algorithms by key rotation rather than redeployment.

Funds stay safe. The EternaX Vault coordinator holds no keys and cannot create or change an approval. Each approver signs in their own app, which re-checks every payment against its own limits and never signs a blind hash, and the vault verifies every signature on-chain.

In EternaX Vault, approver changes go through your admin quorum under a settings time lock, and the vault refuses any change that would leave too few approvers to reach the quorum, so rotation can never lock funds. Approval shares are refreshed in a new ceremony, and any approver can freeze the vault in an emergency.

An EternaX Vault payment costs under $1 in network fees at mid-October 2026 gas prices (about 0.08 gwei, with ETH near $2,430). A payment with an initiator and two approvers uses about 4.7 million gas on Ethereum: about $11 if gas rises to 1 gwei and about $114 at 10 gwei. EVM Layer 2s and EternaX Chain are cheaper still.

Request a vault readiness map with the form on this page or email info@eternax.ai. EternaX maps which keys to protect first and scopes a 30-day pilot with a capped first deployment. No production funds are needed to start.