SECURITY OF A NEW TWO-WAY CONTINUOUS-VARIABLE QUANTUM KEY DISTRIBUTION PROTOCOL
نویسندگان
چکیده
منابع مشابه
Security Thresholds of Multicarrier Continuous-Variable Quantum Key Distribution
We prove the secret key rate formulas and derive security threshold parameters of multi-carrier continuous-variable quantum key distribution (CVQKD). In a multicarrierCVQKD scenario, the Gaussian input quantum states of the legal parties are granulatedinto Gaussian subcarrier CVs (continuous-variables). The multicarrier communicationformulates Gaussian sub-channels from the ...
متن کاملSecurity of continuous-variable quantum key distribution against general attacks.
We prove the security of Gaussian continuous-variable quantum key distribution with coherent states against arbitrary attacks in the finite-size regime. In contrast to previously known proofs of principle (based on the de Finetti theorem), our result is applicable in the practically relevant finite-size regime. This is achieved using a novel proof approach, which exploits phase-space symmetries...
متن کاملScalar Reconciliation for Gaussian Modulation of Two-Way Continuous-Variable Quantum Key Distribution
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 کاملSingle-quadrature continuous-variable quantum key distribution
Most continuous-variable quantum key distribution schemes are based on the Gaussian modulation of coherent states followed by continuous quadrature detection using homodyne detectors. In all previous schemes, the Gaussian modulation has been carried out in conjugate quadratures thus requiring two independent modulators for their implementations. Here, we propose and experimentally test a largel...
متن کاملA Necessary Condition for the Security of Coherent- One-Way Quantum Key Distribution Protocol
The coherent-one-way and the differential-phase-shift protocols are two of the most recent practical quantum key distribution protocols for quantum cryptography. These protocols belong to a class of so-called distributed-phase-reference quantum key distribution protocols. While security proofs for some limited attacks exist, the unconditional security proofs this class of protocol remain unreal...
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: International Journal of Quantum Information
سال: 2012
ISSN: 0219-7499,1793-6918
DOI: 10.1142/s0219749912500591