June 1, 2018
Keyword: BitKey Wallet, NFC card, Innovative Features, Design principles
Bitkey is a simple Bitcoin wallet and focus on private key security. With BitKey you can manage your Bitcoin private keys within your own control. In 2014, BitKey 1.0 was released on appstore.
After about four years, BitKey wallet will introduce a new exciting feature, with some hardware accessories.
Figure: BitKey is ready scanning NFC-XOR-KEY card to sign a transaction.
June 2, 2018
Keyword: Security backup, XOR encryption, perfect secrecy
XOR is short for exclusive-OR operation. XOR is one of the basic binary operations like AND, OR, NOT operation.
Figure: The Vernam Cipher Using XOR operation.
June 4, 2018
Keyword: Best practice, NFC card, XOR encryption, Trusted Solution
For now, there are many kinds of method to storage private-keys, but none of them was perfect. Specially, few of these method can focus on data loss protection (private-key/seed loss). I think the XOR card solution introduced by BitKey will be the best practice with the ability to balance safety and ease use, and, covers the protection of avoiding data loss and theft.
Figure: NFC-XOR-KEY plays a critical role in the solution