SFTP vs FTPS: Which is more secure?

What are the main differences between SFTP and FTPS in terms of security?

SFTP (SSH File Transfer Protocol) uses a single encrypted connection for both commands and data, making it inherently secure. FTPS (FTP Secure), on the other hand, uses SSL/TLS to encrypt the connection, which can lead to multiple ports being opened, potentially increasing security risks.

Which one is generally considered more secure?

SFTP is often considered more secure due to its simpler architecture and the fact that it operates over a single port, reducing the attack surface. FTPS can be secure but may require more complex configurations.

Are there any specific use cases where one is preferred over the other?

Yes, SFTP is commonly preferred in environments where security is paramount, such as in financial services. FTPS might be used in scenarios where legacy systems are in place or when compliance with certain standards is required.

Can you explain how each protocol handles authentication?

SFTP typically uses SSH keys for authentication, which can be more secure than passwords. FTPS can use both username/password and client certificates for authentication, providing flexibility but also complexity.