Bitcoin wallet technology is complex and Armory is the most secure and feature-rich Bitcoin wallet application. Armory pioneered the “cold storage” concept of storing and transacting Bitcoin funds where the private keys are stored only on a computer that is kept entirely offline and supports backing up Bitcoin funds to a printed paper backup.
Armory is tailored for standard, advanced and expert Bitcoin users and is licensed under the “AGPL version 3” which guarantees that Armory and any derivative programs based on Armory source-code will always be open-source.
Insecure Bitcoin wallets and unscrupulous providers have previously resulted in the losses of significant funds for Bitcoin users. In the two full years Armory has been in use, Armory has had no reports of any lost or stolen Bitcoins among users who have used Armory’s printed paper backup feature.
The need for improved wallets has been a hot topic of discussion in the Bitcoin community.
“[Wallets being in ‘dire need of improvement’] is actually very problematic and a tragedy of the commons problem which I fear will likely only get worse because it is so difficult to monetize wallets,” wrote
Core Bitcoin developer and Bitcoin Foundation Board Member Gavin Andresen responded, “Competition will make wallets better, but it will take time. And I agree with Trace that there is a ‘how to monetize’ problem with wallets.”
Armory no longer has that problem and will soon release a new version that dramatically improves the application’s speed and RAM usage. Armory already supports multiple wallets, address importing, paper backups and "coin control" for expert users.
New features will include support for hardware wallets and multi-signature transactions. This will open the door for enterprise level Bitcoin security by requiring that at least two or more people or devices (depending on corporate policies) approve every transaction. The next version will include functionality to create fragmented backups that can be stored in multiple locations for increased physical security.
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