What Security Teams Need to Know about Software Development

Security teams have traditionally been involved late in the software development lifecycle, often being perceived as obstacles, but the industry is shifting towards integrating security earlier in the process through the "shift left" movement. This integration requires security teams to model threats both to applications and their delivery methods, aiding in more informed risk management. Mature software development practices, shaped by comprehensive failure analysis, emphasize sustainability, trust, and quality as the three operational pillars. A significant challenge is managing the sustainability of software, given that 70% of standard application code is open source, with many projects relying on unmaintained components, which introduces risks. Trustworthy software is bolstered through adherence to standards like Supply Chain Levels for Software Artifacts (SLSA), addressing source, build, and availability threats with practices such as multi-factor authentication and branch protection rules. Quality is maintained through automated testing, static security testing, and software composition analysis to ensure software is secure, useful, and generally free of significant bugs. By focusing on these three pillars, mature organizations build resilient software, enhancing their ability to manage potential failures effectively.

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