How do data storage mechanisms in Keychain and Core Data differ in iOS?

Keychain and Core Data are different data storage mechanisms in iOS, designed for different purposes.

• Keychain is a secure storage for small confidential data such as passwords, tokens, certificates. Data in Keychain is encrypted and protected by the system, access is controlled through permissions and biometrics.

• Core Data is a framework for managing object data models and their storage. It is intended for storing and managing large volumes of structured data, such as records, objects with multiple properties and relationships. Core Data does not provide encryption by default.

Thus, Keychain is used for securely storing small secret data, while Core Data is used for organizing and storing complex application data models.