Diffie–Hellman Key Agreement

2021 ◽  
pp. 1-3
Author(s):  
Mike Just ◽  
Carlisle Adams
Keyword(s):  
Key Agreement ◽  
Diffie Hellman

scholarly journals Secure Authentication Scheme Using Diffie–Hellman Key Agreement for Smart IoT Irrigation Systems

Electronics ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 188
Author(s):  
Shadi Nashwan
Keyword(s):  
Key Agreement ◽  
Agricultural Sector ◽  
Authentication Scheme ◽  
Irrigation Systems ◽  
Smart Systems ◽  
High Data ◽  
Diffie Hellman ◽  
Use Of The Internet ◽  
Agriculture Management ◽  
Secure Authentication

Smart irrigation is considered one of the most significant agriculture management systems worldwide, considering the current context of water scarcity. There is a clear consensus that such smart systems will play an essential role in achieving the economic growth of other vital sectors. In general, the consequences of global warming and the unavailability of clean water sources for the agricultural sector are clear indications that the demand for these systems will increase in the near future, especially considering the recent expansions in the use of the Internet of Things (IoT) and Wireless Sensor Network (WSN) technologies, which have been employed in the development of such systems. An obvious result is that security challenges will be one of the main obstacles to attaining the widespread adoption of such systems. Therefore, this paper proposes a secure authentication scheme using Diffie–Hellman key agreement for smart IoT irrigation systems using WSNs. This scheme is based on Diffie–Hellman and one-way hash cryptographic functions in order to support the basic security services with a high data rate and ability to resist well-known attacks. The Burrows–Abadi–Needham (BAN) logic model is used to verify the proposed scheme formally. Based on various possible attack scenarios, a resistance analysis of the proposed scheme is discussed. Further analyses are performed in terms of the storage size, intercommunication, and running time costs. Therefore, the proposed scheme not only can be considered a secure authentication scheme but is also practical for smart IoT irrigation systems due to its reasonable efficiency factors.

scholarly journals Quantum Diffie–Hellman Extended to Dynamic Quantum Group Key Agreement for e-Healthcare Multi-Agent Systems in Smart Cities

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3940
Author(s):  
Vankamamidi S. Naresh ◽  
Moustafa M. Nasralla ◽  
Sivaranjani Reddi ◽  
Iván García-Magariño
Keyword(s):  
System Architecture ◽  
Key Agreement ◽  
Unitary Operation ◽  
Multi Agent System ◽  
Multi Agent Systems ◽  
Group Key ◽  
Group Key Agreement ◽  
Agent Systems ◽  
Diffie Hellman ◽  
Multi Agent

Multi-Agent Systems can support e-Healthcare applications for improving quality of life of citizens. In this direction, we propose a healthcare system architecture named smart healthcare city. First, we divide a given city into various zones and then we propose a zonal level three-layered system architecture. Further, for effectiveness we introduce a Multi-Agent System (MAS) in this three-layered architecture. Protecting sensitive health information of citizens is a major security concern. Group key agreement (GKA) is the corner stone for securely sharing the healthcare data among the healthcare stakeholders of the city. For establishing GKA, many efficient cryptosystems are available in the classical field. However, they are yet dependent on the supposition that some computational problems are infeasible. In light of quantum mechanics, a new field emerges to share a secret key among two or more members. The unbreakable and highly secure features of key agreement based on fundamental laws of physics allow us to propose a Quantum GKA (QGKA) technique based on renowned Quantum Diffie–Hellman (QDH). In this, a node acts as a Group Controller (GC) and forms 2-party groups with remaining nodes, establishing a QDH-style shared key per each two-party. It then joins these keys into a single group key by means of a XOR-operation, acting as a usual group node. Furthermore, we extend the QGKA to Dynamic QGKA (DQGKA) by adding join and leave protocol. Our protocol performance was compared with existing QGKA protocols in terms of Qubit efficiency (QE), unitary operation (UO), unitary operation efficiency (UOE), key consistency check (KCC), security against participants attack (SAP) and satisfactory results were obtained. The security analysis of the proposed technique is based on unconditional security of QDH. Moreover, it is secured against internal and external attack. In this way, e-healthcare Multi-Agent System can be robust against future quantum-based attacks.

A nonlinear decomposition attack

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
Vitaliĭ Roman’kov
Keyword(s):  
Key Agreement ◽  
Deterministic Algorithm ◽  
The Public ◽  
Diffie Hellman ◽  
Public Data ◽  
Algorithmic Problems ◽  
New Type ◽  
Nonlinear Decomposition ◽  
Polycyclic Groups ◽  
Agreement Protocols

AbstractThis paper introduces a new type of attack, termed a nonlinear decomposition attack, against two known group-based key agreement protocols, namely, protocol based on extensions of (semi)groups by endomorphisms introduced by Kahrobaei, Shpilrain et al., and the noncommutative Diffie–Hellman protocol introduced by Ko, Lee et al. This attack works efficiently in the case when finitely generated nilpotent (more generally, polycyclic) groups are used as platforms. This attack is based on a deterministic algorithm that finds the secret shared key from the public data in both the protocols under consideration. Furthermore, we show that in this case one can break the schemes without solving the algorithmic problems on which the assumptions are based. The efficacy of the attack depends on the platform group, so it requires a more thorough analysis in each particular case.

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