Shifting security left in the development lifecycle refers to integrating security activities, such as testing and analysis, earlier in the software development process. This approach aims to identify and remediate vulnerabilities before code reaches production. For example, instead of performing security assessments only after a feature is completed, developers analyze code for security flaws during initial coding phases.
The integration of security early provides several benefits. It reduces the cost of fixing vulnerabilities, as problems are typically cheaper to address when discovered earlier. It also allows for faster development cycles, as developers are not delayed by late-stage security issues. Historically, security was often a separate process conducted towards the end of development, leading to bottlenecks and delayed releases. Shifting it to the left represents a proactive, rather than reactive, security strategy.
