Which mode of encryption secures data while it navigates the CSP network or the Internet?

Encryption of data in transit is the correct choice because it specifically protects data as it travels over the network, whether that be across the Cloud Service Provider's (CSP) infrastructure or the broader internet. This form of encryption ensures that sensitive information, such as login credentials or personal data, is transformed into an unreadable format during transmission. Only parties with the right decryption keys can translate the data back to its original form.

When data is in transit, it is vulnerable to interception and eavesdropping by unauthorized parties. By applying encryption to data in transit, organizations safeguard it against potential breaches or attacks during transmission, thus maintaining confidentiality and integrity.

Data at rest encryption, while important for protecting stored data on servers or storage devices, does not address security concerns for information actively being transferred between systems. Data obfuscation and data masking refer to techniques that alter or obscure data for privacy but are not specifically designed to secure data in transit; they are more focused on modifying data in a way that still allows for limited usability without revealing sensitive information.