另一方面，挑战响应机制需要最少两个通信轮。这两个通信轮涉及可信中心和两个用户之间。此外，还有一个时间戳的方法，在挑战响应机制，渴望时钟同步的假设。这种时钟同步在分布式系统中是没有帮助的。由于可能的攻击和多变的网络延迟特性，这种时钟同步是没有帮助的。此外，在经典密码学中还没有注意到非活动攻击的存在。这些攻击是窃听等同样，量子信道，它是用来摆脱窃听攻击，使重新运行。对于TC（可信中心），减少这一事实使用的不同协议的总回合。这是基于挑战响应机制。在此，我们不使用只有三方验证密钥共享协议。QKDPs（量子密钥分配协议）确定量子机制配置会话密钥和验证会话密钥和公开的谈判以确保正确的窃听。在发送者和接收者之间，公众讨论需要更多的沟通。在区分这一点；经典密码学给出了非常适合的技术。这些合适的技术，允许有能力的密钥验证和用户认证。在早期预测的QKDPs，他们是安全的证据，假设的设计和材料的功能。
英国时尚学作业代写:挑战响应机制
On the other hand, challenge response mechanisms need minimum two communication rounds. These two communication rounds involve among the trusted centre and the two users. And also there is a timestamp approach in challenge response mechanism which desires the hypothesis of clock synchronization. This clock synchronization is not helpful in the distributed systems. Because of possible attacks and also changeable nature of network delays this clock synchronization is not helpful. In addition the existence of inactive attacks cannot be noticed in classical cryptography. These attacks are eavesdropping etc. Similarly, the quantum channel which is used to get rid of the eavesdropping attack so the attacks rerun. To the TC (Trusted centre) , to the decrease the total rounds of different protocols this fact is used. This is based on the challenge response mechanisms. And in this we do not use only three party verified key sharing protocols. QKDPs (Quantum Key Distribution Protocols) determine quantum mechanisms to allocate session keys and prove the rightness of the session key and public negotiations to ensure for the eavesdroppers. In between the sender and receiver the public discussions need more communication rounds. In distinguish to this; the classical cryptography gives the well-suited techniques. These suitable techniques that allows capable key verification and user authentication. In the earlier projected QKDPs, they are the security proof, hypothetical design and material functioning.