Electrum

Electrum is a lightweight Bitcoin client, based on a client-server protocol. It was released on november 5, 2011.

Main features:

• Encrypted wallet
• Deterministic key generation. If you lose your wallet, you can recover it from its passphrase.
• No blockchain download; the client requests that information from a server
• Private keys are not shared with the server.
• Firewall friendly: The client does not need to open a port, it simply polls the server for updates.
• No single point of failure: The server code is open source, anyone can run a server.
• Python. Very compact code, easy to contribute.

Brain Wallet

Electrum uses a type 2 deterministic key generation algorithm. This means that all the keys are derived from a seed.

Electrum makes it easy to memorize its seed, because it uses a mnemonic code.

Example:

• hexadecimal: 8a44dfd6ad4f687b5e3c80563c327027
• mnemonic: "shade weave eternity kept true tangle new talk clay warmth fish match"

Screenshot

Security

See Thin Client Security

links

• homepage: http://ecdsa.org/electrum
• source code: https://gitorious.org/electrum
• download: git clone git://gitorious.org/electrum/electrum.git