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Distributed One Time Password Infrastructure for Linux Environments

Group of Analysis, Security and Systems (GASS), Department of Software Engineering and Artificial Intelligence (DISIA), Faculty of Computer Science and Engineering, Universidad Complutense de Madrid (UCM), 28040 Madrid, Spain
Department of Convergence Security, Sungshin Women’s University, 249-1 Dongseon-Dong 3-ga, Seoul 136-742, Korea
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Entropy 2018, 20(5), 319;
Received: 2 March 2018 / Revised: 14 April 2018 / Accepted: 23 April 2018 / Published: 26 April 2018
(This article belongs to the Special Issue Information Theory and 5G Technologies)
PDF [1250 KB, uploaded 3 May 2018]


Nowadays, there is a lot of critical information and services hosted on computer systems. The proper access control to these resources is essential to avoid malicious actions that could cause huge losses to home and professional users. The access control systems have evolved from the first password based systems to the modern mechanisms using smart cards, certificates, tokens, biometric systems, etc. However, when designing a system, it is necessary to take into account their particular limitations, such as connectivity, infrastructure or budget. In addition, one of the main objectives must be to ensure the system usability, but this property is usually orthogonal to the security. Thus, the use of password is still common. In this paper, we expose a new password based access control system that aims to improve password security with the minimum impact in the system usability. View Full-Text
Keywords: distributed systems; authentication; OTP; PAM; PKI; cryptography; zero-knowledge proofs distributed systems; authentication; OTP; PAM; PKI; cryptography; zero-knowledge proofs

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Benito Peral, A.; Sandoval Orozco, A.L.; García Villalba, L.J.; Kim, T.-H. Distributed One Time Password Infrastructure for Linux Environments. Entropy 2018, 20, 319.

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