What is "when a cryptographic system is used to protect data confidentiality?

When a cryptographic system is used to protect data confidentiality, it means that the data is encrypted in such a way that only authorized individuals are able to decrypt and access the information. This ensures that sensitive information remains secure and confidential, even if it is intercepted by unauthorized parties.

Cryptographic systems use algorithms to convert plaintext data into ciphertext, which is a scrambled version of the original data. The encryption process typically involves the use of cryptographic keys, which are used to both encrypt and decrypt the data. Without the correct key, it is extremely difficult, if not impossible, for unauthorized parties to decrypt the data and gain access to the sensitive information.

In addition to encryption, cryptographic systems also often include mechanisms for key management, authentication, and data integrity to further enhance the security of the data. These additional security measures help ensure that the encrypted data remains confidential and can only be accessed by authorized individuals.

Overall, when a cryptographic system is used to protect data confidentiality, it provides a layer of security that helps prevent unauthorized access to sensitive information, making it an essential tool for securing data in today's digital world.