Can the same attack works if the tag and reader share


Consider the following simple protocol intended to allow an RFID reader to authenticate an RFID tag. The protocol assumes that the tag can store a 32-bit secret key, s, shared with the reader, perform XOR operations, and receive and transmit via radio 32-bit values. The reader generates a random 32-bit challenge x and transmits y = x ⊕ s to the tag. The tag computes z = y ⊕ s and sends z to the reader. The reader authenticates the tag if z = x. (a) Show that a passive eavesdropper that observes a single execution of the protocol can recover key s and impersonate the tag. (b) Can the same attack works if the tag and reader share two secret keys s1 and s2, the reader sends x ⊕ s1 and the tag responds with x ⊕ s2 after recovering x? If not, what kind of attack will work?

Request for Solution File

Ask an Expert for Answer!!
Computer Network Security: Can the same attack works if the tag and reader share
Reference No:- TGS0117811

Expected delivery within 24 Hours