XColdPro

No USB, Bluetooth, NFC, or wireless connectivity required. Designed to minimise physical extraction, side-channel, firmware, and supply chain attack vectors.

An optional Nyxor-exclusive layer for coercion scenarios. What an attacker obtains under forced disclosure does not lead to your assets. Your keys stay standards-based and portable, and the layer is opt-in.

Automated dead man's switch for digital assets. Configurable beneficiary notification ensures estate continuity without third-party custody, legal intermediaries, or custodial risk.

Instant cryptographic key destruction and optional asset evacuation to pre-configured safe wallets in under 0.2 seconds. Engineered for high-threat, time-critical scenarios.

M-of-N multi-signature authorization across all 22 supported blockchain networks — entirely offline. Ideal for families, business partners, and organizations. No smart contract dependency, no online coordination, no hot wallet exposure.

Full native implementation across major protocols including Bitcoin, Ethereum, Solana, Cardano, XRP Ledger and more — plus 8 EVM chains supporting unlimited custom tokens.

Built-in cost basis calculation (FIFO, LIFO, HIFO), annual tax report generation, and portfolio export — computed entirely on-device with zero data transmitted to third parties.

Stealth file architecture, hidden system attributes, and RAM-only key handling — private keys exist only in memory during an operation and are cleared immediately, leaving no forensic trace on disk.

Built-in defenses against keyloggers, clipboard hijackers, screen capture malware, and phishing attacks — operating at the application level in real time. Encrypted keypad input bypasses keystroke logging entirely. Clipboard monitoring re-reads the clipboard after every copy and detects address substitution before a transaction is signed.

SeedVault splits your recovery phrase into 20-word SLIP-39 shards (Shamir Secret Sharing over GF(2⁸)) with any threshold from 2-of-3 to 15-of-16. Fewer shards than the threshold reveal nothing at all — information-theoretic security, not merely computational.

Seeds are standard BIP-39, derived with BIP-32 and BIP-44 account structure using SLIP-44 coin types. Bitcoin supports legacy, nested SegWit and native SegWit derivation, so you hold bc1 addresses. With the optional duress layer off, your wallet restores in Trezor, Ledger, Sparrow, Electrum, MetaMask or Phantom with XColdPro absent. No vendor lock-in, by design.