Problems in application of LDPC codes to information reconciliation in quantum key distribution protocols
نویسنده
چکیده
The information reconciliation in a quantum key distribution protocol can be studied separately from other steps in the protocol. The problem of information reconciliation can be reduced to that of distributed source coding. Its solution by LDPC codes is reviewed. We list some obstacles preventing the LDPC-based distributed source coding from becoming a more favorable alternative to the Cascade protocol for information reconciliation in quantum key distribution protocols. This exposition does not require knowledge of the quantum theory.
منابع مشابه
Efficient Reconciliation of Correlated Continuous Random Variables using LDPC Codes
This paper investigates an efficient and practical information reconciliation method in the case where two parties have access to correlated continuous random variables. We show that reconciliation is a special case of channel coding and that existing coded modulation techniques can be adapted for reconciliation. We describe an explicit reconciliation method based on LDPC codes in the case of c...
متن کاملBlind reconciliation
Information reconciliation is a crucial procedure in the classical post-processing of quantum key distribution (QKD). Poor reconciliation efficiency, revealing more information than strictly needed, may compromise the maximum attainable distance, while poor performance of the algorithm limits the practical throughput in a QKD device. Historically, reconciliation has been mainly done using close...
متن کاملKey Reconciliation with Low-Density Parity-Check Codes for Long-Distance Quantum Cryptography
The speed at which two remote parties can exchange secret keys over a fixed-length fiber-optic cable in continuousvariable quantum key distribution (CV-QKD) is currently limited by the computational complexity of post-processing algorithms for key reconciliation. Multi-edge low-density paritycheck (LDPC) codes with low code rates and long block lengths were proposed for CV-QKD, in order to exte...
متن کاملInformation Reconciliation for Continuous-Variable Quantum Key Distribution using Non-Binary Low-Density Parity-Check Codes
An information reconciliation method for continuous-variable quantum key distribution with Gaussian modulation that is based on non-binary low-density paritycheck (LDPC) codes is presented. Sets of regular and irregular LDPC codes with different code rates over the Galois fields GF(8), GF(16), GF(32), and GF(64) have been constructed. We have performed simulations to analyze the efficiency and ...
متن کاملImproved Secret Key Rate in Quantum Key Distribution using highly irregular Low-Density Parity-Check codes
Quantum key distribution (QKD) has proven to be the most mature subfield of quantum information theory, elegantly spanning the gap between theory and practice. It is a simple, and yet sophisticated idea, in which the fundamental principles of modern quantum mechanics are employed to distribute a provably secure cryptographic key between two parties. With many variations of this scheme realized,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- CoRR
دوره abs/0908.2042 شماره
صفحات -
تاریخ انتشار 2009