Unnecessary Complexity in Protection Mechanism (Not Using 'Economy of Mechanism')

Security controls should follow the principle of 'economy of mechanism'—the simpler they are, the more reliable they become. Complex designs increase the chance of implementation errors, compatibility issues, and mismatches between the intended security model and its real-world deployment. Developers are more likely to correctly implement, test, and maintain straightforward solutions. This principle also applies to data structures and validation logic. Overly complex data specifications force you to write equally complex validation code, which is prone to bugs. Whenever possible, favor simple system architectures and data models, as they naturally require simpler and more robust security checks.