However, the problem you have with FTPS and SFTP is although the files are securely transferred to your server, once they're uploaded, anyone who accesses the server can see them, because they aren't encrypted. With this in mind, I prefer your first solution, which is to have your hosts encrypt the files using the recipients public PGP key. This option not only ensures the files are encrypted while in transit, and when at rest, but also only the intended recipient can decrypt and view the files. The best solution to your problem, however, is probably a combination of both PGP-encrypted files and a secure FTP connection. Because even if your PGP encrypted files are secure, if your hosts use plain FTP to upload files to your server the username and password used to access the server are sent in the clear. An attacker could potentially steal this information and use it to gain access to the FTP server and upload malicious files or delete existing files.
Dig Deeper on IPv6 security and network protocols security
Related Q&A from Michael Cobb
WhatsApp vulnerabilities can enable hackers to bypass end-to-end encryption and spoof messages. Expert Michael Cobb explains how these attacks work ... Continue Reading
Disabling Google location tracking involves more than turning off Location History. Learn how to manage your account settings to stop tracking ... Continue Reading
Compared to TLS 1.2, TLS 1.3 saw improvements in security, performance and privacy. Learn how TLS 1.3 eliminated vulnerabilities using cryptographic ... Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.