Which security design principle favors simple implementations and minimal components and therefore supports using single sign on systems and credential managers?

Component reuse is about utilizing existing, proven components, which can be part of secure design but is not the principle focused on simplicity and minimal components.

Least common mechanism states that security mechanisms should not be shared between different users or entities if not strictly necessary, which is distinct from preferring simple implementations.

Economy of mechanism suggests that security mechanisms should be as simple and small as possible, making them easier to understand, implement correctly, and verify for security flaws. Using single sign-on systems and credential managers aligns with this principle by centralizing and simplifying authentication and credential management, reducing the number of separate security components and potential points of failure.

Open design means that the security of a mechanism should not depend on the secrecy of its design or implementation, which is not about simplicity or minimal components.