What does encryption do?

Encryption serves the critical function of converting information into a coded format to ensure its security. When data is encrypted, it transforms into unreadable text or a string of characters that can only be reverted to its original form through a specific decryption key or method. This process protects sensitive information from unauthorized access, meaning that even if data is intercepted or accessed by malicious actors, it remains secure and inaccessible without the proper credentials.

The choice related to increasing internet accessibility does not relate to encryption, as encryption's primary focus is on safeguarding information, not on making it more available to users. Similarly, reducing file size for faster uploads pertains to data compression rather than security measures like encryption. Lastly, logging user internet activity is about monitoring and recording online behavior, which is not a function of encryption but rather a separate aspect of data privacy and security practices. Ultimately, B highlights the essential role encryption plays in maintaining the confidentiality and integrity of data in our increasingly digital world.