If someone, or malware, takes control of your computer, they "own" your computer. They can see EVERYTHING on it. Passwords, credit cards. Everything. There is no effective way to conceal a password, except from someone who knows nothing about computers. (unless you encrypt the hard drive) Nothing related to SGview.
If you are speaking of someone "hacked" into your FTP account, they hacked your FTP account, that has nothing to do with SGview. If you do not use a strong password (10 or more random chrs) any FTP acct can be hacked very quickly by the "Thousands of Hackers" looking for "free" storage space on the internet.. Still, nothing to do with SGview.
If someone is "packet sniffing" YOUR connection, you have problems. Still, nothing to do with SGview.
more reading :
http://angel.net/~nic/passwd.htmlhttp://www.schneier.com/passsafe.htmlhttp://www.google.com/search?domains=ww ... +passwordshttp://www.pctools.com/guides/password/