A wireless authentication system comprising: an active wireless communication device comprising a first memory , first processing circuitry , and a first antenna , the first processing circuitry being operative to: produce an identifier request for an identifier, ID, and cause the first antenna to transmit the identifier request; receive the ID in a response to the identifier request; identify, based on the ID and data in the first memory , a location of a second memory to access; produce an access request for the identified location of the second memory and cause the first antenna to transmit the access request; and receive a response to the access request; a passive wireless communication device comprising a second memory , second processing circuitry , a second antenna , and a power harvesting circuitry to convert electromagnetic power incident on the second antenna to electrical power for the second memory and the second processing circuitry , the second processing circuitry being operative to: produce the response to the identifier request, the response including the ID, and cause the second antenna to produce the response; receive the access request; retrieve data from or write data to the identified location of the second memory based on the access request; and cause the second antenna to transmit the response to the access request. an active wireless communication device comprising a first memory , first processing circuitry , and a first antenna , the first processing circuitry being operative to: produce an identifier request for an identifier, ID, and cause the first antenna to transmit the identifier request; receive the ID in a response to the identifier request; identify, based on the ID and data in the first memory , a location of a second memory to access; produce an access request for the identified location of the second memory and cause the first antenna to transmit the access request; and receive a response to the access request; produce an identifier request for an identifier, ID, and cause the first antenna to transmit the identifier request; receive the ID in a response to the identifier request; identify, based on the ID and data in the first memory , a location of a second memory to access; produce an access request for the identified location of the second memory and cause the first antenna to transmit the access request; and receive a response to the access request; a passive wireless communication device comprising a second memory , second processing circuitry , a second antenna , and a power harvesting circuitry to convert electromagnetic power incident on the second antenna to electrical power for the second memory and the second processing circuitry , the second processing circuitry being operative to: produce the response to the identifier request, the response including the ID, and cause the second antenna to produce the response; receive the access request; retrieve data from or write data to the identified location of the second memory based on the access request; and cause the second antenna to transmit the response to the access request. produce the response to the identifier request, the response including the ID, and cause the second antenna to produce the response; receive the access request; retrieve data from or write data to the identified location of the second memory based on the access request; and cause the second antenna to transmit the response to the access request. <EOS>