Quantum key distribution (QKD) is a secure communication method that implements a cryptographic protocol involving components of quantum mechanics.It enables two parties to produce a shared random secret key known only to them, which then can be used to encrypt and decrypt messages.The process of quantum key distribution is not to be confused with quantum cryptography, as it is the best-known ...

E91 protocol, proposed by Artur Ekert in 1991, uses Bell states emitted by a common source (SPDC) and distributed between Alice and Bob. Alice and Bob use then randomly chosen

量子密钥分发 （quantum key distribution, QKD）指 通过量子信道分享密钥的一系列方案。 此处简单列举 BB84, B92, E91 三种。 方案： 双方通过经典信道公开各自的 X, Z 测量基，一致部分对应的结果作为密钥。 窃听检测： Alice, Bob 公开比对以上密钥的一个子集。 若存在窃听者 Eve，则会有约 1/4 的比对结果不一致，由此可发现窃听。 方案： Bob 通过经典信道告诉 Alice 确定态的序号，确定态对应的 01 序列作为密钥。 窃听检测： Alice, Bob 公开比对以上密钥的一个子集。 …

2008年3月1日 · The proposed multi-qubit QKD model for secure cloud data using quantum cryptography involves the use of a quantum key distribution protocol to generate a secure key for encryption and...

The aim of the study is to find weaknesses in the E91 protocol and understand how well it can withstand different kinds of quantum attacks. This work uses math and computer simulations to carefully study and make sure the protocol is secure.

Additionally, the study implements the E91 QKD protocol utilizing the Entanglement Pair Generation (EPR) method to produce secure keys. While the existing E91 protocol ensures security through Bell’s theorem and Bell’s inequality, it overlooks the impact of noise, leading to inaccuracies in eavesdropper detection.

2022年12月12日 · The Ekert protocol proposed by Artur Ekert in 1991 is a method for quantum key distribution. The protocol is based on the principle of quantum entanglement and a clever use of the identities ...

This code implements the E91 protocol, which is a quantum key distribution protocol used to establish a secret key between two parties, Alice and Bob, over an insecure channel. The protocol involves the use of entangled qubits and the measurement of those qubits in different bases.

2025年3月26日 · The E91 protocol, also known as the Ekert91 protocol, is a quantum key distribution (QKD) protocol proposed by Artur Ekert in 1991. Unlike the BB84 protocol,

2024年8月14日 · In this post I’ll go over the E-91 protocol for Quantum Key Distribution, which describes how to securely distribute an encryption key while taking advantage of quantum properties to...