Business-to-business (B2B) interactions are evolving beyond the bounded traditional network perimeter. Security controls need to advance as well — especially as new access methods emerge to create an entirely new partner ecosystem. Forrester has devised four tiers of access control that are essential for secure future B2B interactions. Cloud-based services will complement application and data security, with the emergence of application controls in the cloud. Smart Grid and Smart City projects, businesses will have complex and pervasive partner relationships, some nontraditional in nature.”]
Source: https://www.csoonline.com/article/2125256/the-4-tiers-of-a-secure-b2b-framework.html