What is the function of encryption in data protection?

Encryption plays a crucial role in data protection by transforming readable data into an unreadable format using algorithms and encryption keys. This process ensures that only authorized users, who possess the correct decryption key, can access and read the original data. The primary goal of encryption is to protect sensitive information from unauthorized access, thereby maintaining confidentiality, integrity, and privacy, which are core principles of data security.

By rendering data unreadable to anyone without proper authorization, encryption effectively mitigates risks associated with data breaches, unauthorized access, and eavesdropping. Even if an unauthorized individual gains access to encrypted data, they would be unable to interpret it without the decryption key. This is especially vital in environments such as financial services, healthcare, and any sector where personal or sensitive information is handled.

The other choices describe functions that are not aligned with the core purpose of encryption. Deleting unnecessary data pertains to data management practices, improving accessibility relates to user experience and system design, and enhancing system speed and performance deals with optimization techniques rather than securing data.