Client-Side Encryption
Client-side encryption is a security technique where data is encrypted on the user's device (client) before being transmitted or stored, ensuring that only the client holds the decryption keys. This approach protects sensitive information from being accessed by service providers, hackers, or unauthorized third parties during transmission or while at rest on servers. It is commonly used in applications handling confidential data like messaging, cloud storage, and financial transactions to enhance privacy and compliance.
Developers should implement client-side encryption when building applications that require high levels of data privacy, such as secure messaging apps, healthcare systems, or financial platforms, to prevent unauthorized access by service providers or during data breaches. It is essential for compliance with regulations like GDPR or HIPAA, which mandate data protection, and in scenarios where users need full control over their encryption keys, such as in zero-knowledge architectures. Use cases include end-to-end encrypted chat, secure file storage services, and sensitive data processing in web or mobile apps.