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Key Exchange Protocols



Basic Concepts in Cryptography


Encryption scheme:
functions to encrypt, decrypt data
key generation algorithm
Secret key vs. public key
Public key: publishing key does not reveal key-1
Secret key: more efficient, generally key = key-1
Hash function, MAC
Map input to short hash; ideally, no collisions
MAC (keyed hash) used for message integrity
Signature scheme
Functions to sign data, verif ....etc

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Presented by:
MS.T.JEEVITHA


Step-by-Step Key and Message Exchange
Cryptographic private/public key solutions are susceptible to man-in-the-middle attacks. These attacks take a variety of forms, including eavesdropping, substitution, denial of service, and phishing. The Cryptography Next Generation (CNG) secure communication example addresses substitution, in which a third party (Mallory) inserts himself between two communication endpoints (Alice and Bob).
The following sections provide background informatio ....etc

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Implementation of Diffie-Hellman Key Exchange on
Wireless Sensor Using Elliptic Curve Cryptography
v


Samant Khajuria, Henrik Tange
Wirelesscenter-CTIF-Copenhagen
Copenhagen University College of Engineering & Aalborg University
Lautrupvang 15, 2750 Ballerup, Copenhagen, Denmark


abstract

This work describes a low-cost Public key Cryptography
(PKC) based solution for security services such as
authentication as required for wireless sensor networks. We
have implemented a software approach using Ellip ....etc

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Presented By:
Yanjiang Yang

Robert H. Deng

Feng Bao

ABSTRACT
Most password-based user authentication systems place total trust on the authentication server where cleartext passwords or easily derived password verification data are stored in a central database. Such systems are, thus, by no means resilient against offline dictionary attacks initiated at the server side. Compromise of the authentication server by either outsiders or insiders subjects all user passwords to exposure and may have serious legal and financial r ....etc

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Hi Sir Can you send the source code for diffie hellman key exchange implemented using matlab for transfer of data It's urgent Plz Plz.... ....etc

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Abstract
Three-party authenticated key exchange protocol(3PAKE) is an important cryptographic technique for securecommunication which allows two parties to agree a new securesession key with the help of a trusted server. In this paper, weproposed a new three-party authenticated key exchange protocolwhich aims to achieve more efficiency with the same security levelof other existing 3PAKE protocols. Security analysis and formalverification using AVISPA tools show that the proposed protocolis secure against various known attacks. Comparin ....etc

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Password Authenticated Key Exchange


ABSTRACT:
Password-Authenticated Key Exchange (PAKE) studies how to establish secure communication between two remote parties solely based on their shared password, without requiring a Public Key Infrastructure (PKI). Despite extensive research in the past decade, this problem remains unsolved. Patent has been one of the biggest brakes in deploying PAKE solutions in practice. Besides, even for the patented schemes like EKE and SPEKE, their security is only heuristic; researchers h ....etc

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Need Implementation of Elliptic curve Deffie helman algorithm in ns2. Please any one help me ....etc

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SECURE KEY EXCHANGE AND ENCRYPTION
FOR GROUP COMMUNICATION IN
WIRELESS ADHOC NETWORKS


ABSTRACT

Ad hoc wireless networks is primarily important, because the communication
signals are openly available as they propagate through air and are more susceptible to attacks ranging from passive eavesdropping to active interfering. The lack of any central coordination and shared wireless medium makes them more vulnerable to attacks than wired networks. Nodes act both as hosts and routers and are interconnect ....etc

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