D-Link announced their official implementation of the IEC 62443-4-1 industry security standard, which was certified by internationally recognized certification organization T..V NORD. The IEC standard, Product Security Development Life-Cycle Requirements, specifies process requirements for the secure development of products used in industrial automation and control systems, including the development environment, supply chain, and delivery process. The life-cycle includes the security requirements definition, design, implementation, verification and validation, management, and product end-of-life.
Source: https://www.helpnetsecurity.com/2021/01/18/d-link-iec-62443-4-1/