Ledger Nano
Ledger Nano is a series of hardware wallets designed to securely store private keys for cryptocurrencies and other digital assets offline. These USB-like devices provide cold storage by keeping keys isolated from internet-connected devices, requiring physical confirmation for transactions. They support a wide range of cryptocurrencies and integrate with software wallets like Ledger Live for management.
Developers should learn to use Ledger Nano when building or interacting with blockchain applications that require high-security key management, such as DeFi protocols, NFT platforms, or cryptocurrency exchanges. It's essential for protecting assets in development environments, testing smart contracts with real funds, or implementing secure multi-signature setups where physical key storage is critical.