| Shift Left Security is a software and product development methodology that integrates security practices into the earliest stages of the development lifecycle — design, coding, and testing — rather than treating security as a final pre-release checkpoint. The term "shift left" refers to moving security activities to the left side of the development timeline, where vulnerabilities are least costly to resolve. In industrial OT environments, Shift Left Security aligns with IEC 62443-4-1 (2018 edition) — the international standard for secure product development lifecycle requirements in industrial automation and control systems (IACS). |
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