Cryptocurrency securing method and device thereof

A cryptocurrency securing device, comprising:

• a storage module, being configured to store a first asymmetric key which is paired with a second asymmetric key of a user device, an encrypted personal key, a first encrypted one-time key, a first encrypted hash factor data and an encrypted cryptocurrency private key information;
• a transceiver, being configured to:
• receive an encrypted personal identification number from the user device, wherein the encrypted personal identification number is encrypted by the second asymmetric key;
• transmit the first encrypted one-time key to a cloud server so that the cloud server decrypts the first encrypted one-time key via a third asymmetric key for deriving a first one-time key, wherein the first encrypted one-time key is encrypted by a fourth asymmetric key stored in the storage module of the cryptocurrency securing device and the third asymmetric key is paired with the fourth asymmetric key;
• and
• receive the first one-time key from the cloud server;
• a processor, being connected to the transceiver and the storage module electrically, and configured to:
• decrypt the encrypted personal identification number via the first asymmetric key for deriving a personal identification number;
• decrypt the first encrypted hash factor data via the first one-time key for deriving a hash factor data;
• decrypt the encrypted personal key via the personal identification number and the hash factor data for deriving a personal key;
• decrypt the encrypted cryptocurrency private key information via the personal key for deriving a cryptocurrency private key information, wherein the cryptocurrency private key information includes a cryptocurrency private key or a mnemonic word data of the cryptocurrency private key, and the cryptocurrency private key corresponds to at least one cryptocurrency on blockchain;
• and
• use the cryptocurrency private key for a transaction of the at least one cryptocurrency on blockchain.