Continuous-variable quantum enigma machines for long-distance key distribution
نویسندگان
چکیده
منابع مشابه
Continuous-variable quantum enigma machines for long-distance key distribution
Quantum physics allows for unconditionally secure communication through insecure communication channels. The achievable rates of quantum-secured communication are fundamentally limited by the laws of quantum physics and in particular by the properties of entanglement. For a lossy communication line, this implies that the secret-key generation rate vanishes at least exponentially with the commun...
متن کاملLong-Distance Continuous-Variable Quantum Key Distribution with Advanced Reconciliation of a Gaussian Modulation
The two-way continuous-variable quantum key distribution (CVQKD) systems allow higher key rates and improved transmission distances over standard telecommunication networks in comparison to the one-way CVQKD protocols. To exploit the real potential of two-way CVQKD systems a robust reconciliation technique is needed. It is currently unavailable, which makes it impossible to reach the real perfo...
متن کاملLong Distance Continuous-Variable Quantum Key Distribution with a Gaussian Modulation
We designed high-efficiency error correcting codes allowing to extract an errorless secret key in a Continuous-Variable Quantum Key Distribution (CVQKD) protocol using a Gaussian modulation of coherent states and a homodyne detection. These codes are available for a wide range of signalto-noise ratios on an Additive White Gaussian Noise Channel (AWGNC) with a binary modulation and can be combin...
متن کاملLong-distance continuous-variable quantum key distribution by controlling excess noise
Quantum cryptography founded on the laws of physics could revolutionize the way in which communication information is protected. Significant progresses in long-distance quantum key distribution based on discrete variables have led to the secure quantum communication in real-world conditions being available. However, the alternative approach implemented with continuous variables has not yet reac...
متن کاملUnconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation.
We present a continuous-variable quantum key distribution protocol combining a discrete modulation and reverse reconciliation. This protocol is proven unconditionally secure and allows the distribution of secret keys over long distances, thanks to a reverse reconciliation scheme efficient at very low signal-to-noise ratio.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2015
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.92.062312