SFTP is a subset of the SSH2 protocol, which supports password and public key authentication. It provides strong data encryption, and prevents the interception or modification of login, data, and session information during the transfer.
No, InterScan Web Security Suite (IWSS) and InterScan Web Security Virtual Appliance (IWSVA) does not support SFTP (encrypted or secured) protocol scanning. Currently, only HTTP and FTP scans are supported.