(ISC)2 Certified in Cybersecurity Practice Exam

What is the primary purpose of encryption?

1. To store data securely

2. To protect private information

3. To validate user identity

4. To enable access control

The correct answer is: To protect private information

The primary purpose of encryption is to protect private information. Encryption transforms data into a format that is unreadable to unauthorized users, ensuring that sensitive information remains confidential and secure from prying eyes. This process involves the use of algorithms and keys; when data is encrypted, only those who possess the correct decryption key can return it to its original, readable format. Although encryption does have auxiliary benefits related to data storage, user validation, and access control, its core function is safeguarding the confidentiality of private information. For example, while encrypted storage protects data from being easily accessed in case of a data breach, the primary focus remains on preventing unauthorized access to sensitive content. User identity validation and access control can be achieved through other means, such as multi-factor authentication and role-based access control, which do not inherently rely on encryption. Therefore, the standout purpose of encryption is its role in securing private information from unauthorized disclosure.