>It has proven very difficult to add "security" to the scp model.
>>Compared to the SCP protocol, which only allows file transfers, the SFTP protocol allows for a range of operations on remote files which make it more like a remote file system protocol.
>>Compared to the SCP protocol, which only allows file transfers, the SFTP protocol allows for a range of operations on remote files which make it more like a remote file system protocol.
https://en.wikipedia.org/wiki/SSH_File_Transfer_Protocol
If you want the best "JUST File-transfer prog" use nc or rsync over ssh