Mr. Alexandru Vlădescu Profile

Alexandru Vlădescu

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Proceedings Article | 2 March 2023 Paper

Security in remote access, based on zero trust model concepts and SSH authentication with signed certificates

Cristina-Raluca Iță, Rodica-Claudia Constantinescu, Alexandru Vlădescu, Bogdan Alexandrescu

Proceedings Volume 12493, 124932T (2023) https://doi.org/10.1117/12.2643058

KEYWORDS: Computer security, Network security, Information security, Networks, Data storage

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This paper aims to resume the information on the various ways in which security can be achieved when it comes to accessing external resources from the outside through company devices or personal devices. When planning security policies, it is essential to start with the idea that anything outside is exposed to the risk of infection. We will analyze the Zero Trust model and other security concepts in order to use them for remote access. The model has been designed to adapt to the modern needs of the workforce and employers, including remote work in terms of maximum cyber security, minimizing the risk of resource exploitation (people, devices, applications or data). In order to make the transition to such a model, this paper will implement and test a solution for remote management of resources (applications, servers), which implements some of the principles of Zero Trust architectures, starting from the classic version SSH (Secure Shell) access. The solution involves accessing, securing and authorizing a secure virtual machine via SSH, and then securing access to production resources. The technical mechanism by which these operations are performed presupposes that after authentication on the buffer machine a user certificate is automatically requested which will be signed by a certification authority. This certificate contains the group to which the operator belongs so that, by presenting this certificate, it is allowed to authenticate, authorize and audit access to the resources that will be managed by the user in that session.

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