Virtual code-based transaction system, method and program

A virtual code generation device for transactions, the device comprising:

• a processor configured to:
• match control command information corresponding to a purchase request of a user among a plurality of User Identifications (UIDs) stored in the virtual code generation device and generate one or more detail codes based on the UIDs;
• generate a virtual code by combining the one or more detail codes using a virtual code generation function;
• and
• transmit, via a wireless communication, the virtual code to a virtual code reception device or a virtual code verification device, wherein the virtual code generation device is connected with the virtual code reception or the virtual code verification device, via the wireless communication,
• wherein the virtual code generation device stores a plurality of UIDs, matches control command information with a first UID of the plurality of UIDs during a first preset period, and changes the control command information to be matched with a second UID of the plurality of UIDs during a second preset period.

A virtual code verification device for transactions, the device comprising:

• a processor configured to:
• receive, via a wireless communication, from a virtual code generation device, a virtual code, wherein the virtual code verification device and the virtual code generation device are connected via the wireless communication;
• extract a detail code from the virtual code;
• search a storage location of a User Identification (UID) based on the detail code, wherein the storage location indicates a point on a track of a storage location search algorithm, and the point corresponds to a time point when a user requests a registration of the UID;
• match the UID and extract stored control command information;
• verify the virtual code;
• and
• perform control based on the extracted control command information,
• wherein the virtual code verification device stores a plurality of UIDs, matches control command information with a first UID of the plurality of UIDs during a first preset period, and changes the control command information to be matched with a second UID of the plurality of UIDs during a second preset period.