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Robo-FTP Server supports password-protected encrypted ZIP files through use of Server Event scripts. Two encryption ciphers are supported with ZIP: the original PKZIP encryption scheme and AES-256. The original PKZIP encryption scheme is now known to be insecure, but it has an advantage that most ZIP programs are able to decrypt files using this cipher, if provided with the correct password. AES-256, in contrast, is an extremely secure, military-grade cipher, and though not all ZIP programs are able to understand AES-256-encrypted ZIP files, most commercial programs do support this cipher, including current versions of WinZip (since 2004), and WinRAR (since 2013).  When more than a casual layer of security is necessary, a ZIP file should either be encrypted with AES-256 or else protected by an additional layer of encryption such as PGP (for data-at-rest) or SSL (for data-in-transit).

 

For more information on ZIP files (encrypted or otherwise) and how to use them, consult the documentation for the ZIP and UNZIP commands, which can be found under the Script Programming | Script Commands topic in the Robo-FTP Script Help File.