Abstract: In some embodiments, a method of performing a person-to-person financial transaction includes receiving an active authentication transaction key at a mobile financial transaction instrument of a transferor from a financial institution, storing the active authentication transaction key in a non-transient machine-readable storage medium of the mobile financial transaction instrument of the transferor, and transferring the active authentication transaction key to a mobile financial transaction instrument of a transferee for completion of the person-to-person financial transaction using wireless transmission.

Abstract: A method of performing a fund transfer at an ATM includes receiving an active authentication transaction key at an ATM from a mobile financial transaction instrument via a wireless communication protocol, generating a PIN at the ATM, and storing the PIN in a machine readable storage medium. An authorization request message is transmitted to a financial institution identified by the active authentication transaction key. The authorization request message includes the PIN and at least a portion of the active authentication transaction key. The PIN is received from a user of the mobile financial transaction instrument, and the funds are dispensed in response to receiving the PIN.

Abstract: A financial transaction method includes receiving a request to perform a financial transaction from a user having an account with a financial institution that receives the request, generating an active authentication transaction key in response to the request, and transmitting the active authentication transaction key to a mobile financial transaction instrument of the user. A request to authenticate a transaction, including at least a portion of the active authentication transaction key, is received from an automated teller machine. An authorization response is transmitted to the automated teller machine if is determined that the transaction is authorized, the account of the user is settled to complete the financial transaction.

Abstract: A financial transaction method includes receiving a request to perform a financial transaction at a financial institution, generating a single-use transaction key for the financial transaction, and storing at least a first portion of the transaction key in a storage medium. The transaction key is transmitted to a user that requested the financial transaction, and an authorization request including at least a second portion of the transaction key is received from a merchant. The second portion of the transaction key received from the merchant is compared to the first portion of the transaction key to determine if the transaction should be authorized. An authorization message is transmitted to the merchant if the second portion of the transaction key received from the merchant matches the first portion of the transaction key. The financial transaction is funded from an account of the user if the financial transaction is authorized.