Quantum Inf Process (2014) 13:1–4 DOI 10.1007/s11128-013-0719-1 EDITORIAL Gerald Gilbert · Yaakov S. Weinstein Published online: 3 January 2014 © Springer Science+Business Media New York 2013 The problem of private communication in the presence of an eavesdropper has been studied for centuries. While various techniques have been explored, a complete solu- tion has been proven possible only 30 years ago. This solution has two basic compo- nents: the one-time pad and quantum key distribution (QKD). The one-time pad is an encoding method that can achieve unconditionally secret communications if the sender and receiver share a secret key, a random sequence of symbols with which a message can be encoded. A secret key can be generated (even in the presence of an eavesdropper) using QKD. Together, the one-time pad and QKD provide a completely secret end-to-end cryptosystem: key distribution via QKD followed by encryption of the desired message using the key material as a one-time pad. An example of a complete cryptographic system is shown in Fig. 1 and can be described as follows. Alice wishes to send a message M to Bob. She encodes the message using a shared key K via transformation T . The encoded message E
Quantum Information Processing – Springer Journals
Published: Jan 3, 2014
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