Copay & GreenAddress Scramble to Stop Google from Storing Your Private Keys

Open source blockchain developer Blockstream, notable for its endeavor for developing sidechains for the bitcoin blockchain has acquired multi-wallet provider GreenAddress. The acquisition, it says, will help the strengthen its sidechain platform. In an announcement yesterday, bitcoin blockchain-centric Blockstream revealed its acquisition of European multisig bitcoin wallet GreenAddress, in a move that will further accelerate its sidechains development platform. Founded in 2014, Malta-based GreenAddress was among the earliest bitcoin wallets to provide features like per-transaction....

Not terribly long after the release of the Copay beta via the web interface at Copay.io comes the news that the official Copay application for Android devices has hit the Google Play Store. The application is essentially the mobile version of the service, if you haven't already guessed (if you have, gold star on your forehead). It's a unique bitcoin wallet system that ups security by allowing wallet creators to require cosigners in order for bitcoin holdings to be spent or otherwise transmitted. It's open source, meaning anyone who knows what they're doing can review the code, and already,....

BitPay’s multi-signature wallet solution – called Copay – has added TREZOR Hardware Wallet support. Even though the TREZOR hardware wallet has been around since 2013, it has taken a while for the BitPay engineers to integrate this functionality into Copay. The long wait is finally over, however, as the Chrome desktop app for Copay has been updated. Integrating TREZOR functionality into the Copay Chrome app brings additional functionality to the table. For example, Copay users will be able to sign transactions with their TREZOR hardware Bitcoin wallet, rather than only being able to do so....

There has been quite a lot of buzz surrounding multisig (multisignature) and bitcoin. But what exactly is it? Many think it's the future of bitcoin, and for a good reason. In short, multisignature transactions are unique in that they allow for more than one private key to control a wallet address. At present, most users deal with one public address, and one public. The issue with that is that it becomes incredibly easy to lose access to funds should the private key become compromised. As put by BitPay today on the BitCore blog: In a 2-of-2 multisignature transaction, a private key from....

Of all the formalized monetary systems that have ever been used by mankind, Bitcoin is unique in the fact that it exists entirely as pure information. The blockchain, the database storing Bitcoin transactions so the system can figure out who owns what, it stored simultaneously on tens of thousands of computers and servers around the world. The system's equivalent of "accounts", Bitcoin addresses, are also really nothing more than 160-bit numbers, and the private keys that allow withdrawal access are 256-bit numbers themselves. The result of this is that we can literally store our money in....