Security

You own your keys.
We own nothing.

CryptKeeper is built on the principle of absolute self-custody. Your cryptographic keys are generated, stored, and managed entirely on your device.

Non-Custodial

What does non-custodial mean?

Unlike centralized exchanges and custodial wallets, CryptKeeper never has access to your funds. There is no account, no password, no server-side storage of any kind.

Your wallet exists entirely on your device. When you create a wallet, a cryptographic seed phrase is generated locally using your device's secure random number generator. This seed phrase is the master key to all your wallets across all 19 supported blockchains.

We cannot freeze your funds. We cannot access your keys. We cannot reverse your transactions. You have absolute sovereignty over your digital assets.

You control

Seed phrase, private keys, all wallet addresses, transaction signing

We never see

Private keys, seed phrases, wallet passwords, personal data, transaction details

Key Generation

BIP39 / HD Wallet Standard

CryptKeeper uses the industry-standard BIP39 mnemonic system with hierarchical deterministic (HD) key derivation.

Mnemonic Generation

A 12 or 24-word seed phrase is generated using 128 or 256 bits of cryptographically secure entropy from your device.

Key Derivation

From your seed phrase, a master key is derived using PBKDF2-SHA512. Child keys for each blockchain are derived using BIP32/BIP44 paths.

Local Encryption

Your seed phrase is encrypted at rest using AES-256-GCM with a key derived from your wallet password via Argon2id.

Zero Knowledge

What we never see

Your seed phrase / mnemonic
Your private keys
Your wallet passwords
Your transaction history
Your portfolio balances
Your personal identity

Hardware Wallet

Ledger Integration

For maximum security, CryptKeeper Pro supports Ledger hardware wallets. Your private keys never leave the hardware device — transactions are signed on the Ledger itself, providing air-gapped security even if your computer is compromised.

Air-gapped transaction signing
Support for Ledger Nano S, Nano X, and Stax
Multi-chain derivation paths
Blind signing protection

Hardware wallet support
Available on CryptKeeper Pro

Third-Party Services

External integrations

CryptKeeper integrates with trusted third-party services for specific functionality. Each integration has its own privacy policy and data handling practices.

On-Ramp Providers

Transak, MoonPay, and Ramp Network handle fiat-to-crypto purchases. KYC/AML requirements are handled by these providers, not CryptKeeper.

Market Data

CoinGecko API provides real-time pricing, market cap, and chart data. No personal data is shared with CoinGecko.

Blockchain RPCs

Public RPC endpoints connect to each blockchain network. Transaction data is broadcast publicly to the network, as is standard for all blockchain wallets.