Paste of changes/improvements: RELEASE-NOTES # Release 2.0 * Before you upgrade, make sure you have saved your wallet seed on paper. * Documentation is now hosted on a wiki: http://electrum.orain.org * New seed derivation method (not compatible with BIP39). The seed phrase includes a version number, that refers to the wallet structure. The version number also serves as a checksum, and it will prevent the import of seeds from incompatible wallets. Old Electrum seeds are still supported. * New address derivation (BIP32). Standard wallets are single account and use a gap limit of 20. * Support for Multisig wallets using parallel BIP32 derivations and P2SH addresses ("2 of 2", "2 of 3"). * Compact serialization format for unsigned or partially signed transactions, that includes the BIP32 master public key and derivation needed to sign inputs. Serialized transactions can be sent to cosigners or to cold storage using QR codes (using Andreas Schildbach's base 43 idea). * Support for BIP70 payment requests: - Verification of the chain of signatures uses tlslite. - In the GUI, payment requests are shown in the 'Invoices' tab. * Support for hardware wallets: Trezor (Satoshilabs) and Btchip (Ledger). * Two-factor authentication service by TrustedCoin. This service uses "2 of 3" multisig wallets and Google Authenticator. Note that wallets protected by this service can be deterministically restored from seed, without Trustedcoin's server. * Cosigner Pool plugin: encrypted communication channel for multisig wallets, to send and receive partially signed transactions. * Audio Modem plugin: send and receive transactions by sound. * OpenAlias plugin: send bitcoins to aliases verified using DNSSEC. * New 'Receive' tab in the GUI: - create and manage payment requests, with QR Codes - the former 'Receive' tab was renamed to 'Addresses' - the former Point of Sale plugin is replaced by a resizeable window that pops up if you click on the QR code * The 'Send' tab in the Qt GUI supports transactions with multiple outputs, and raw hexadecimal scripts. * The GUI can connect to the Electrum daemon: "electrum -d" will start the daemon if it is not already running, and the GUI will connect to it. The daemon can serve several clients. It times out if no client uses if for more than 5 minutes. * The install wizard can be used to import addresses or private keys. A watching-only wallet is created by entering a list of addresses in the wizard dialog. * New file format: Wallets files are saved as JSON. Note that new wallet files cannot be read by older versions of Electrum. Old wallet files will be converted to the new format; this operation may take some time, because public keys will be derived for each address of your wallet. * The client accepts servers with a CA-signed SSL certificate. * ECIES encrypt/decrypt methods, availabe in the GUI and using the command line: encrypt <pubkey> <message> decrypt <pubkey> <message> * The Android GUI has received various updates and it is much more stable. Another script was added to Android, called Authenticator, that works completely offline: it reads an unsigned transaction shown as QR code, signs it and shows the result as a QR code.
