Ultra-Lightweight Cryptography for Low-Cost RFID Tags: Hummingbird Algorithm and Protocol

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Executive Summary

Motivated by the design of the well-known Enigma machine, the authors present a novel ultra-lightweight encryption scheme, referred to as Hummingbird, and its applications to a privacy-preserving identification and mutual authentication protocol for RFID applications. Hummingbird can provide the designed security with a small block size and is therefore expected to meet the stringent response time and power consumption requirements described in the ISO protocol without any modification of the current standard. They show that Hummingbird is resistant to the most common attacks such as linear and differential cryptanalysis. Furthermore, they investigate some properties for integrating the Hummingbird into a privacy-preserving identification and mutual authentication protocol.

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