Blockchain secure transaction method and device based on biomarker authentication

A server, comprising:

• a first acquirer configured to acquire first biometric encrypted information corresponding to a target payee user, and generate a transaction key by encrypting according to the first biometric encrypted information after first request information sent by a target payer for a target transaction with the target payee user is received;
• a determiner configured to determine whether prompt information indicating successful verification of the transaction key is received, and when the prompt information is received, acquire the transaction information of the target transaction upon successful completion of the target transaction;
• and
• a recorder configured to release the transaction information of the target transaction to each network node of the blockchain, so as to record the transaction information of the target transaction at each network node;
• wherein the first biometric encrypted information refers to encoded information obtained by performing an encryption operation on the biometric information of the target payee user;
• and the biometric information includes fingerprints, iris, palm prints or facial features.

A terminal, comprising:

• a second acquirer configured to acquire a transaction key generated according to first biometric encryption information of a payee and an identity code of a user corresponding to a current terminal after first request information sent by a target payer for a target transaction is received;
• wherein the identity code includes fourth biometric encrypted information of the user corresponding to the current terminal;
• and
• a verifier configured to verify the transaction key according to the fourth biometric encrypted information;
• and send prompt information indicating successful verification of the transaction key when the transaction key is successfully verified, and receive transaction information in which the target transaction has been recorded and information on the successful completion of the target transaction sent from the server;
• wherein the fourth biometric encrypted information refers to encoded information obtained by performing an encryption operation on the biometric information of the user corresponding to the current terminal;
• and the biometric information includes fingerprints, iris, palm prints or facial features.