Improved Methods and Systems for Creating and Controlling Use of Transaction Keys

A method for controlling creation and use of transaction keys, the method being performed by a server computer system and comprising:

• identifying an authorization code that is associated with a first user device, wherein the authorization code, when received from a second user device, triggers the server computer system to determine whether to authorize execution of a subsequent transaction;
• after the authorization code is identified but before the authorization code is received from the second user device, identifying a set of one or more parameters associated with the subsequent transaction, wherein:
• the set of one or more parameters correspond to input entered at the first user device, and
• the set of one or more parameters at least partially define requirements that must be satisfied by the second user device in order to trigger the execution of the subsequent transaction,
• whereby the execution of the subsequent transaction is dependent on both receipt of the authorization code from the second user device and satisfaction of the set of one or more parameters by the second user device;
• generating and storing an authorization record for the subsequent transaction, the authorization record including the authorization code and the set of one or more parameters;
• after the authorization record is generated, receiving a transaction request from the second user device, the transaction request including the authorization code and identified attributes of the second user device;
• and
• upon determining that the second user device's identified attributes satisfy the set of one or more parameters, generating an authorization for the subsequent transaction, or, upon determining that the second user device's identified attributes do not satisfy the set of one or more parameters, refraining from generating the authorization for the subsequent transaction.