Security Status Quo
Public APIs are exposed on the Internet, allowing anyone to access services from anywhere. Callers can schedule data and processes by passing necessary fields into APIs. Such APIs require the highest level of security and usability monitoring.
While there are few restrictions on public APIs, such as authorization restrictions, loopholes are frequent to detect in business authentication logic, and attackers prefer to target and bypass these APIs through automated fuzz testing and targeted testing.
Internal APIs are usually deployed and operated in a data center or private cloud network for internal use, mainly for operation management and internal services.
Using internal APIs has more restrictions, such as authentication restrictions, with low authentication and security strength. Such APIs are vulnerable to targeted attacks and thus have become the culprit for data breaches.
Channel APIs are usually deployed and operated in a data center or private cloud network, providing specific external partners and suppliers with limited access to internal APIs to extract and manage data. Such APIs are more sensitive to data leakage than data extraction.
The access control level is higher than internal APIs but lower than external APIs. It’s the same case with security control, which is guaranteed mainly through API gateway. When supply chain attacks happen, channel APIs are easily utilized for data abuse due to the lack of monitoring and supervision mechanisms.