Most of the cryptocurrencies require users to handle one private key to access wallets and perform transactions. Bitcoin Vault developed a 3-Key Security Solution which requires users to generate three Elliptic Curve Digital Signature Algorithm (ECDSA) keys – one is stored automatically within the app and the other two need to be managed by the user. The current setup in Bitcoin Vault allows users to cancel initiated transactions and reverse them to an existing or a new wallet address. Solution supports three ECDSA key with different roles in the ecosystem: Standard Transaction Key is generated automatically and works in the background. It is required to initiate all transactions, and to recover a wallet in case of a hack or technical issue. Cancel Transaction Key allows users to perform Cancel transactions within approximately 24 hours, after 144 blocks are generated. Fast Transaction Key gives users the possibility to make Secure Fast transactions and transfer BTCV in a matter of minutes. SHA-256 suplay 21 000 000