<div align="center">Quantum malware</div>

When quantum communication networks proliferate they will likely be subject to a new type of attack by hackers, virus makers, and other malicious intruders. Here we introduce the concept of “quantum malware” to describe such human-made intrusions. We offer a simple solution for storage of quantum information in a manner, which protects quantum networks from quantum malware. This solution involves swapping the quantum information at random times between the network and isolated, distributed ancillas. It applies to arbitrary attack types, provided the protective operations are themselves not compromised.
Keywords Quantum malware - quantum cryptography - quantum communication - quantum computation - decoherence

Lian-Ao Wu1 and Daniel Lidar1

(1) Departments of Chemistry, Electrical Engineering-Systems, and Physics, University of Southern California, Los Angeles, CA 90089, USA

Received: 24 January 2006 Accepted: 26 January 2006 Published online: 29 March 2006

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