2FA Protected accounts are back. Here's the full setup, start to finish: back up your wallet, add email, SMS and an authenticator app, then send with 2FA. One key on your device, one held by @Blockstream behind 2FA.

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Since securely storing a 256-bit number is impractical, Bitcoin wallets simplify it with a “seed phrase”—a list of 12-24 words representing the key.

A private key is a massive 256-bit number (up to 77 digits) that grants control over Bitcoin.

Setting up a multisig wallet comes with its own complexity. It’s not as simple as backing up more seed phrases - you’ll also need to back up the wallet descriptor. Blockstream Jade natively handles this, storing multisig wallet descriptors with essential data like wallet fingerprints, derivation paths, and the extended public keys of all wallets in the setup.

When it comes to Bitcoin wallets, a single private key provides total control - but also total risk. Creating a singlesig wallet means backing up one 12-24 word seed phrase that represents the one private key that controls your Bitcoin. But if you lose that key - those 12-24 words, whether stored on a hardware wallet or engraved on metal - your Bitcoin is gone. Permanently.