Veyrnox Wallet
A self-custody cryptocurrency wallet built for coercion resistance and plausible deniability. Your seed is your identity — keys never touch a server.
Stack: Vite · React · Capacitor (iOS & Android) · ethers v6 · @noble/@scure cryptography
Status
All 10 assets are testnet-verified — each has a real on-chain send confirmed on a block explorer. Throughout this README, "verified" means a real on-chain testnet transaction, never merely passing tests or a clean review.
An independent third-party audit (ECC, June 2026) covered the core wallet. The hardware-KEK layer and native OS-level RASP are internally device-verified only — independent audit of those areas is still outstanding. Features are marked as one of BUILT (in code, testnet/provisional), TARGET (designed, not yet confirmed in shipped code), or roadmap; nothing below should be read as independently audited unless stated.
Features
Multi-chain support
One HD seed derives per-chain accounts. EVM assets share a single secp256k1 address; BTC and SOL have independent derivation paths.
| Asset | Derivation | Status |
|---|
| ETH, MATIC, ARB, OP | m/44'/60' (secp256k1) | Live · testnet-verified |
| AVAX, BNB | m/44'/60' (shared EVM) | Live · testnet-verified |
| USDC, USDT | ERC-20 contract calls on the EVM address | Live · testnet-verified |
| BTC | m/84'/0' (SegWit, UTXO/PSBT) | Live · testnet-verified |
| SOL | SLIP-0010 (ed25519) | Live · testnet-verified |
Coercion resistance (S3)
- Duress PIN — unlocks a separate decoy wallet with its own seed, balances, and history
- Hidden wallets — deniable chaff-slot pool (256 fixed-length slots, all users) hides wallet count
- Panic wipe — irreversible local key-material destruction triggered by a panic PIN or in-app action
- Deniability sessions — decoy/hidden sessions make zero backend calls (I3); no wallet-count tells, no cardinality leaks
Hardware-bound encryption (KEK)
PIN/password-derived factor (Argon2id) is combined with a hardware factor via HKDF — both must be present to unlock.
| Platform | Hardware factor | Biometric gate |
|---|
| iOS | Secure Enclave ECIES | Face ID / Touch ID (no credential fallback) |
| Android | AndroidKeyStore HMAC-SHA256 (StrongBox-preferred, TEE-accepted) | Biometric-only (no credential fallback) |
| Web (Phase 1) | WebAuthn PRF platform authenticator | password-only fallback on Safari |
Status: BUILT and device-verified on real hardware (internal review only — this layer is not yet independently audited).
Transaction security (S2)
- Pre-sign simulation — local-first dry-run preview (eth_call, UTXO analysis, SOL simulation) with risk flags before signing
- Address safety — poison/look-alike address warnings, spam token filtering
- Token approvals — view and revoke ERC-20 allowances
- Anomaly detection — local history-aware heuristics (large-to-new-recipient, approve-then-transfer patterns)
- Fee control — per-chain fee tiers (Slow/Standard/Fast/Custom) with gas caps
WalletConnect v2
Full dApp signing support with security controls:
- RASP pre-sign gate — blocked environment = rejected request, key never touched
- EIP-712 chain binding — domain chainId validated against WC session; mismatch or missing chainId = reject
- personal_sign address binding — resolves EIP-1474 vs MetaMask param order; rejects if neither param matches wallet address
- Gas cap — dApp-supplied gas clamped to 1,000,000
- Session expiry — expired/absent session = reject
- Step-up re-auth — stale auth window = reject before any key operation
Runtime integrity (S4 — RASP)
Browser-level automation and hooking detection is live and e2e-proven: an automated or hooked environment trips the BLOCK tier, which is unconditional — signing is refused (not warned) and cannot be overridden by acknowledgement.
Native OS-level integrity is partial: the Android root/Frida/emulator/tamper probe is built and wired but not yet verified on a real rooted/hooked device; the iOS jailbreak probe and remote attestation (Play Integrity / App Attest) are roadmap. Probes fail honest — an unavailable probe degrades to WARN, never a fabricated "clean" result.
Security model
| Invariant | Description |
|---|
| I1 | Keys never leave the device |
| I2 | No silent data egress |
| I3 | Deniability mode makes zero backend calls |
| I4 | Fail honest, fail closed — no fake security |
| I5 | Backend untrusted by design |
| I6 | Hardware-bound KEK: HKDF(H ‖ C), ordered concatenation, not XOR |
Vault cryptography
- AES-256-GCM with fresh IV per encryption, no nonce reuse
- Argon2id KDF — new vaults 96 MiB / 6 iterations / parallelism 1; vaults created
before 2026-08-24 stay at 192 MiB / 3 iterations until the migration flag flips
(same total work: 192×3 = 96×6)
- Blob-stored KDF params for forward-compatible migration
crypto.getRandomValues only — no Math.random in wallet-core
AI Security Protection
- Per-page context awareness — detects surface (send, receive, buy, settings, WalletConnect, deniability, plans, security dashboard, access/recovery, duress PIN, panic wipe, address screening, seed/QR, hardware wallets, personal backup, pre-sign scanner, biometric auth, token approvals, spam/trust score, suspicious assets, analytics, tax report, transaction history) and tailors guidance.
- Pre-sign risk explanation — address poisoning, wrong address, wrong chain, excessive fees, scam addresses; recipient verification, amount double-check, gas fee understanding.
- Token approval guidance — unlimited approvals, revocation, malicious dApp abuse of stale approvals.
- Address screening interpretation — explains BLOCKED / CAUTION / CLEAR / UNKNOWN honestly; reminds local verification still matters.
- Spam / suspicious asset triage — flags unsolicited tokens as phishing lures, separates local heuristics from contract fields from unknowns.
- Seed / key hygiene — discourages screenshots, cloud sync, digital copying; "anyone who sees the seed controls the funds".
- Deniability explainer — decoy vs stealth wallets, panic wipe consequences, I3 (zero network calls in deniability mode).
- dApp / WalletConnect guidance — permissions, legitimacy checks, approval risks, session disconnect timing.
- Deniability suppression — Vigil makes zero network calls when decoy/duress session active (I3 invariant).
