Backup private-keys/seed-words on paper. It is risk.
Backup AES encrypted data on cloud storage. It is not perfect. The cloud administer or hacker can brute-force break the encrypted data.
Is there a better method?
Using BitKey you can manage your private-keys within your own control. "For most, coin loss is a larger risk than coin theft", Bitkey hold the same point of view and implamented with trusted data backup solutions, which can resistant brute-force attack.
Full use of biometric protection provided by smart phones, such as face lock and fingerprint lock. BitKey is keep studying mobile platform's environment and implemanet a number of security and easy-using features.
BitKey 3.0 will introduce a new exciting feature, with some NFC hardware accessories . This solution will be one of the best practices with the ability to balance safety and ease-use, and provides unbreakable data backup protection.
Bitkey's workflow want to demonstrate Bitcoin's internal mechanisms, such as the transaction signing and transaction broadcast process. This image illustrates using an NFC-XOR-KEY card to decrypt the XOR-ed private-key and sign a transaction.
BitKey 1.0 is released on appstore in 2014. BitKey is still keep simple and focus on private-key security. The app is a worldwide product and many of users like BitKey‘s style. It is mainly popular in Russia, the United States, the United Kingdom, Germany and Canada.