## 10 Conclusions  
The main focus of this paper is to identify the main research trends in secure software development and to know the results of their proposals. The main findings are summarized as follows: 9810 articles were selected using a search string established from the PICO (Population, Intervention, Comparison, and Outcomes) strategy outlined in [67]. The results were limited to the last five years, from 2018 to 2022, obtaining a total of 368 articles. Repeated articles, as well as those that were already literature reviews, were eliminated from the selection so that they would not influence or affect the present study. With this limitation of articles, the total number of papers selected for the first reading was 312 articles. After reading the abstract, 51 articles were selected for full reading, of which 12 were not included in the study because we did not have access to them. Finally, the study was carried out with 39 scientific articles. The 39 articles selected and reviewed were classified into three dimensions for analysis: by time, by context in which they are developed, and by type of work. The time dimension classifies the works according to the year of publication, considering the limitation that we have considered of the last 5 years. The context dimension corresponds to the scenarios where the research is developed; the scenarios considered correspond to: Health, Organizations, Vulnerabilities, Cybersecurity, Education, Critical Infrastructure, and Software Industry. With respect to the categories according to the type of work, the dimensions were we have the category Implementation, which corresponds to works that generate new proposals for the development of secure software. Analysis categories are those works that perform analysis or comparisons of studies analysis or comparisons of studies related to secure software development, or when the works correspond to reviews of Finally, the Use category corresponds to those works that are based on applying or presenting proposals from other authors on topics related to secure software development. The analysis shows that the largest number of works is concentrated in the category of implementations, with 28 works representing 72%. Of these 28 studies, 17 correspond to the Software Industry category according to the context in which they are developed, representing 44% of the total. Regarding the time dimension of these 17 works, it is evident that their concentration is in the year 2020 with 6 works, then there is a decline in the years 2021 and 2022, which may be due to the pandemic. According to our research, it is essential to note that of the 17 articles that propose implementations, there are 9 articles that address security in all phases of the SDLC, which represents 23% of the total selected. From the above analysis, we can conclude that the Design, Implementation, and Validation phases are the least addressed in the analyzed literature. In response to the results obtained from the new development models or frameworks to ensure security in softwaredevelopment, several results are distinguished; according to the findings, there are 10 articles that do not indicate whether the result is better or worse, which represents 26% of the articles, 19 articles indicate having good results of their proposed implementations with 49%, only 1 work indicates that its result was worse after the evaluation (2%) and 4 works indicate that the result is neutral with 10%. The contribution of this paper is to share the current trends about the existing methods for software development involving security. With this scenario, it is possible to provide resources to researchers that allow them to come up with a general framework covering the main security challenges in the software development life cycle, which aims to drive the development of more secure software by inexperienced developers.