Which of the following are NOT one of the four principles of object oriented programming (OOP)?

Which of the following are NOT one of the four principles of object oriented programming (OOP)?

• Inheritance
• Polymorphism
• Abstraction
• Encryption 

EXPLANATION

The four principles of object-oriented programming are encapsulation, abstraction, inheritance, and polymorphism.

These words may sound scary for a junior developer. And the complex, excessively long explanations in Wikipedia sometimes double the confusion.