Shlomi Dolev (Inventor), Marina Kopeetsky (Inventor), Adi Shamir (Inventor)

Research output: Patent


A method and apparatus for repeated communication sessions between a sender (e.g., RFID tag) and a receiver (RFID reader) that employs a proactive information security scheme is based on the assumption that the information exchanged during at least one of every n successive communication sessions is not exposed to an adversary. The sender and the receiver maintain a vector of n entries that is repeatedly refreshed by pairwise XORING entries, with a new vector of n entries that is randomly chosen by the sender and sent to the receiver as a part of each communication session. Also, a computational secure scheme based on the information secure scheme is employed to ensure that even in the case that the adversary listens to all the information exchanges, the communication between the sender and the receiver is secure. In particular, the scheme can be used in the domain of remote controls (e.g., for cars).

Original languageEnglish
Patent numberUS2009225985
IPCH04L 9/ 00 A I
Priority date11/09/07
StatePublished - 10 Sep 2009


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