Western Governors University (WGU) HLTH2160 D393 History of Healthcare in America Practice Exam

The term for the protection of sensitive data by making it unreadable without a key is encryption. This process transforms readable data, known as plaintext, into an encoded version, called ciphertext, which can only be reverted back to plaintext through a specific key. This key is essential for authorized users to access the original data, ensuring confidentiality and security.

Encryption serves a critical role in protecting sensitive information, such as personal data, financial records, and proprietary business information, from unauthorized access or breaches. As a result, it is widely used in various sectors, including healthcare, where patient information must be kept secure and private.

The other terms relate to different concepts: decryption is the reverse process of turning ciphertext back into readable plaintext, authentication verifies the identity of users or systems, and transmission refers to the act of sending data from one location to another. Each plays a role in data security and communication, but encryption specifically focuses on making data unreadable without appropriate authorization.