Quantum Key Distribution Based on
Selective
Post-Processing in Passive Optical
Networks
Abstract:
In quantum cryptography, Quantum Key Distribution Protocols (QKDPs)
employ quantum mechanisms to distribute session keys and public discussions to
check for eavesdroppers and verify the correctness of a session key. Key
Distribution Protocols are used to facilitate sharing secret session keys between
users on communication networks.Cryptanalysis is an important branch in the
study of cryptography, including both the classical cryptography and the quantum
one. A high-speed quantum key distribution (QKD) system has been developed
with the goal of secure key generation under transmission loss.Quantum key
distribution protocol which works on network security by the use of key
agreement. Secrete Key which is used by each user in the network. Each user has
unique Secrete and which will be shared by each user to Trusted Center. In Trusted
Center we have generate a Key for network Security with the Help of Algorithms
and Quantum Mechanics. Through that we have to prove how secure the data has
been transmitted over network to receiver. It enables two parties to produce a
shared random bit string known only to them, which can be used as a key to
encrypt and decrypt messages. The main advantage is that the integration is
straightforward and does not require any modification, neither of the QKD systems
nor of the network standard, including Encryption and decryption.
Existing System:
 In classical Cryptography Challenge-Response Authentication Mechanism
(CRAM) was used.
 In Challenge-Response Authentication Mechanism is the two-level (basic
authentication and digest authentication) scheme for authenticating network
users that is used as part of the Web's Hypertext Transfer Protocol (HTTP).
 The "basic" authentication scheme is based on the model that the client must
authenticate itself with a user-ID and a password for each real.
 Although the scheme is easily implemented, it relies on the assumption that
the connection between the client and server computers is secure and can be
trusted.
Proposed System:
 This project presents Quantum Key Distribution Protocols (QKDP’s) to
safeguard security in large networks.
 Key Distribution Protocols are used to facilitate sharing secret session keys
between users on communication networks.
 In this project the sender and the receiver should register themselves into the
separate databases maintained for them and then whenever each user either
on the sender or the receiver side makes a login request, an individual secret
key is created.
 The Trusted Center considered being the three party authenticates both the
sender and the receiver, the secret key is generated by the Trusted Center.
 Registration phase after providing username and password, user must
generate one unique key for identification. That is Secret key.
 This key will take part in our final key (Quantum Key). At this instance our
system will store every detail such as username.
 It enables two parties to produce a shared random bit string known only to
them, which can be used as a key to encrypt and decrypt messages.
 To generate a secure key while satisfying both high speed and high security.
Hardware Requirements:
 Processor
:
Pentium IV 2.4 GHz
 Hard Disk
:
40 GB
 RAM
:
256 MB
Software Requirements:
 IDE
:
 Programming Language
:
C#.net
 Database
:
Sql Server
 Operating System
:
Windows XP
Microsoft VS.NET-2005