  These days, software development and security go hand in hand. Numerous
techniques and strategies are discussed in the literature that can be applied
to guarantee the incorporation of security into the software development
process. In this paper the main ideas of secure software development that have
been discussed in the literature are outlined. Next, a dataset on
implementation in practice is gathered through a qualitative interview research
involving 20 companies. Trends and correlations in this dataset are found and
contrasted with theoretical ideas from the literature. The results show that
the organizations that were polled are placing an increasing focus on security.
Although the techniques covered in the literature are being used in the real
world, they are frequently not fully integrated into formal, standardized
processes. The insights gained from our research lay the groundwork for future
research, which can delve deeper into specific elements of these methods to
enhance our understanding of their application in real-world scenarios.
