Biometric-based transaction authorization and fraud prevention

A method, comprising:

• capturing biometric data corresponding to a user associated with a user account;
• generating a transaction tag including transaction data associated with a transaction and the user account;
• establishing a direct wireless connection with a terminal;
• and
• transferring the transaction tag to the terminal, the transaction being authorized by an issuer in response to a verification of the biometric data verified by the verifying computing device, the biometric data being included in the transaction tag or being verified prior to the transaction.

A non-transitory, computer-readable medium, comprising machine-readable instructions that, when executed by a processor of a computing device, cause the computing device to at least:

• establish a direct wireless connection with a client device associated with a user;
• receive a transaction tag from the client device via the direct wireless connection, the transaction tag including transaction data associated with a transaction between the user and a merchant;
• generate an authorization request comprising the transaction data and biometric data associated with the user;
• send the authorization request to an issuer computing device associated with the client device;
• and
• authorize the transaction based at least in part on a response to the authorization request from the issuer computing device.