What does client-side encryption primarily ensure?

Client-side encryption primarily ensures that data is encrypted by the client before it is sent to the server. This process involves the client applying encryption algorithms to the data, converting it into a format that cannot be easily read or accessed by unauthorized users. The encrypted data is then transmitted to the server, where it can be stored securely.

By performing encryption on the client side, the sensitivity of the data is preserved during transmission. Only users or systems possessing the appropriate decryption keys can access or interpret the data, ensuring that unauthorized parties, including potential attackers intercepting the data during transit, cannot read it.

This method of encryption is especially vital for protecting sensitive information such as personal identification details, financial data, or proprietary information, as it adds a robust layer of security before the data ever reaches its final destination. While other choices may imply different aspects of data handling, the key feature of client-side encryption revolves around the initial encryption by the client itself.