A wireless access tag duplication device, system and method is provided. The wireless access tag duplication system comprises: a wireless access tag reader; a wireless access tag writer; a processor, coupled to the wireless access card reader and the wireless access card writer; and a memory. The memory includes instruction code, executable by the processor, for: determining a first key of a first wireless access tag; determining remaining keys of the first wireless access tag using nested authentication and the first key; reading data of the first tag using the wireless access card reader, the first key and the remaining keys; and writing the data to a second tag using the wireless access card writer, the first key and the remaining keys.