What is the process of converting data into a code to prevent unauthorized access called?

The process of converting data into a code to prevent unauthorized access is known as encryption. This process transforms readable data, often referred to as plaintext, into an unreadable format called ciphertext. The purpose of encryption is to secure sensitive information, making it difficult for unauthorized individuals to access or understand the data, even if they manage to intercept it.

Encryption is widely used in various applications, such as securing online transactions, protecting personal information, and safeguarding confidential communications. By using algorithms and keys, encryption ensures that only individuals with the correct keys can decrypt the data, restoring it to its original, readable form.

In contrast, decryption is the reverse process that converts the ciphertext back into plaintext, while transmission refers to the act of sending data from one location to another, and storage pertains to keeping data in a system or storage device.