http://revistas.ucasal.edu.ar/index.php/CI <p><em>Cuadernos de Ingeniería</em> is a scientific publication of the Faculty of Engineering of the Catholic University of Salta, Argentina, created in 2006 and published under the imprint EUCASA (Ediciones Universidad Católica de Salta).</p> <p>It is an annual journal, which contains scientific articles, technological developments, review articles, essays and book reviews on topics related to the disciplinary field of Engineering in all its branches, including topics such as engineering education, the performance of the profession, ethics and values in engineering, the interrelationships between engineering and politics, culture, economy, society and the environment.</p> <p>It is an open access journal published under a Creative Commons Attribution-NonCommercial-ShareAlike license.</p> EUCASA (Ediciones Universidad Católica de Salta) es-ES Cuadernos de Ingeniería 2545-692X http://revistas.ucasal.edu.ar/index.php/CI/article/view/720 <p class="keywords"><span lang="EN-US">The digitalization of medical records is key to optimizing the efficiency and quality of healthcare, although the protection of patient data remains a major challenge. In this regard, Blockchain technology has emerged as a promising alternative to improve security in the healthcare field. However, its traceable nature can compromise patient privacy, especially in the management of electronic medical records. To address this challenge, privacy coins, which employ advanced cryptographic techniques such as ring signatures and zero-knowledge proofs, could ensure anonymity and data protection. This study analyzes whether these technologies are being used to improve medical record management in blockchain-based environments, evaluating their effectiveness in protecting privacy, their interoperability, and their technical and operational feasibility. Through a systematic review, research questions and search and selection criteria for articles were established, obtaining 72 studies, of which 24 were included in the analysis. While no direct implementations of privacy coins in electronic medical records were identified, models were found that combine blockchain with decentralized technologies to strengthen the privacy of medical data. These coins allow for anonymization and granular access control, offering significant advantages for the protection of information. In addition, their integration with technologies such as IoMT, FHIR and smart contracts could reinforce security, although it is essential to balance protection and usability for their application in the health sector.</span></p> Guillermina Rosana Nievas Mario Matias Urbieta Copyright (c) 2025 Guillermina Rosana Nievas, Mario Matias Urbieta https://creativecommons.org/licenses/by-nc-sa/4.0 2025-09-30 2025-09-30 16 XVI 1 17 10.53794/ci.v16iXVI.720 http://revistas.ucasal.edu.ar/index.php/CI/article/view/742 <p>The research project "Development of a Management System for an FTTH System" conducted by UNLaM students, under the premise of addressing real-world design problems in a controlled environment, forced the working group to reconsider their chosen design options.</p> <p>This article presents a proposed architectural redesign of an FTTH (Fiber to the Home) management system. The transition from a synchronous API Gateway-based architecture to an event-based architecture with asynchronous communication is analyzed. The solution relies on the combined application of the SAGA pattern and the Transactional Outbox Pattern (TOP), with the goal of ensuring consistency and resilience in distributed transactions. Benefits, challenges, and recommendations for its effective implementation are discussed.</p> Carlos Peliza Copyright (c) 2025 Carlos Peliza https://creativecommons.org/licenses/by-nc-sa/4.0 2025-12-01 2025-12-01 16 XVI 1 10 10.53794/ci.v16iXVI.742