scholarly journals Cryptanalysis of Kowada-Machado key exchange protocol

2018 ◽  
Vol 4 (1) ◽  
pp. 12
Author(s):  
M Coutinho ◽  
T C de Souza Neto ◽  
Robson De Oliveira Albuquerque ◽  
Rafael Timóteo de Sousa Júnior
Keyword(s):  
Recent Work ◽  
Open Problem ◽  
Key Exchange ◽  
Public Key ◽  
Key Exchange Protocol ◽  
Diffie Hellman ◽  
Shared Key ◽  
Diffie Hellman Key Exchange

A non-interactive key exchange (NIKE) protocol allows N parties who know each other’s public key to agree on a symmetric shared key without requiring any interaction. A classic example of such protocol for N = 2 is the Diffie-Hellman key exchange. Recently, some techniques were proposed to obtain a NIKE protocol for N parties, however, it is still considered an open problem since the security of these protocols must be confirmed. In a recent work, Kowada and Machado [1] proposed a protocol that solves the NIKE problem for N parties. However, this work found security problems in the proposed solution and implemented an efficient attack to their protocol demonstrating that their key-exchange scheme is insecure.

A Faster Software Implementation of the Supersingular Isogeny Diffie-Hellman Key Exchange Protocol

2018 ◽  
Vol 67 (11) ◽  
pp. 1622-1636 ◽  
Author(s):  
Armando Faz-Hernandez ◽  
Julio Lopez ◽  
Eduardo Ochoa-Jimenez ◽  
Francisco Rodriguez-Henriquez
Keyword(s):  
Key Exchange ◽  
Software Implementation ◽  
Key Exchange Protocol ◽  
Diffie Hellman ◽  
Diffie Hellman Key Exchange

scholarly journals Extended supersingular isogeny Diffie–Hellman key exchange protocol: Revenge of the SIDH

2021 ◽  
Author(s):  
Daniel Cervantes‐Vázquez ◽  
Eduardo Ochoa‐Jiménez ◽  
Francisco Rodríguez‐Henríquez
Keyword(s):  
Key Exchange ◽  
Key Exchange Protocol ◽  
Diffie Hellman ◽  
Diffie Hellman Key Exchange

scholarly journals A Certificateless Noninteractive Key Exchange Protocol with Provable Security

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Xuefei Cao ◽  
Lanjun Dang ◽  
Yingzi Luan ◽  
Wei You
Keyword(s):  
Random Oracle Model ◽  
Random Oracle ◽  
Key Exchange ◽  
Public Key ◽  
Communication Overhead ◽  
Key Exchange Protocol ◽  
The Public ◽  
Diffie Hellman ◽  
Message Exchange ◽  
Certificateless Public Key Cryptosystem

In this paper, we propose a certificateless noninteractive key exchange protocol. No message exchange is required in the protocol, and this feature will facilitate the applications where the communication overhead matters, for example, the communications between the satellites and the earth. The public key certificate is removed as well as the key escrow problem using the certificateless public key cryptosystem. The security of the protocol rests on the bilinear Diffie–Hellman problem, and it could be proved in the random oracle model. Compared with previous protocols, the new protocol reduces the running time by at least 33.0%.

scholarly journals One Variant of Diffie-Hellman Key Exchange Protocol

2007 ◽  
Vol 14C (6) ◽  
pp. 471-474 ◽  
Author(s):  
Dae-Hun Nyang ◽  
Kyung-Hee Lee
Keyword(s):  
Key Exchange ◽  
Key Exchange Protocol ◽  
Diffie Hellman ◽  
Diffie Hellman Key Exchange

scholarly journals Enhancement of Security of Diffie-Hellman Key Exchange Protocol using RSA Cryptography.

2022 ◽  
Vol 2161 (1) ◽  
pp. 012014
Author(s):  
Chiradeep Gupta ◽  
N V Subba Reddy
Keyword(s):  
Key Exchange ◽  
Secret Key ◽  
Key Exchange Protocol ◽  
Diffie Hellman ◽  
Shared Secret ◽  
Diffie Hellman Key Exchange ◽  
Intended Receiver ◽  
Rsa Cryptography ◽  
Shared Secret Key ◽  
Mitm Attack

Abstract Cryptography is related and referred to as the secured transmission of messages amongst the sender and the intended receiver by ensuring confidentiality, integrity, and authentication. Diffie – Hellman (DH) key exchange protocol is a well-known algorithm that would generate a shared secret key among the sender and the intended receiver, and the basis of cryptosystems for using public and private key for encryption and decryption process. But it is severely affected by the Man in the Middle (MITM) attack that would intercept and manipulate thus eavesdropping the shared secret key. This paper proposes a model of integrating the public-key RSA cryptography system with the DH key exchange to prevent the MITM attack. The performance of the proposed work has been compared to the DH Key Exchange algorithm as well as RSA Cryptosystem to conclude for effectiveness of the proposed model.

scholarly journals Modification of Traditional RSA into Symmetric-RSA Cryptosystems

Cryptography ◽  
2020 ◽  
pp. 120-128
Author(s):  
Prerna Mohit ◽  
G. P. Biswas
Keyword(s):  
Digital Signature ◽  
Discrete Logarithm ◽  
Prime Numbers ◽  
Public Key ◽  
Key Exchange Protocol ◽  
Factorization Problem ◽  
Rsa Algorithm ◽  
Diffie Hellman ◽  
Diffie Hellman Key Exchange ◽  
Rsa Cryptography

This paper addresses the modification of RSA cryptography namely Symmetric-RSA, which seem to be equally useful for different cryptographic applications such as encryption, digital signature, etc. In order to design Symmetric-RSA, two prime numbers are negotiated using Diffie-Hellman key exchange protocol followed by RSA algorithm. As the new scheme uses Diffie-Hellman and RSA algorithm, the security of the overall system depends on discrete logarithm as well as factorization problem and thus, its security is more than public-key RSA. Finally, some new cryptographic applications of the proposed modifications are described that certainly extend the applications of the existing RSA.

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