Password Protect a .exe File

I'm new here, and recently got PortableApps on my flash drive. I really like it so far, and one of the apps I got is Google Chrome portable. I really like that I can bring my Chrome profile on any computer that I don't own so I don't have to login to my Google Account, and then log back out once I'm finished, or if the computer doesn't even have Chrome. Thing is, though, I don't want my information open to anyone who may have my USB drive in case it gets lost or stolen.
I'm wondering if there's a way to password protect the GoogleChromePortable.exe file so that when I launch it from the PortableApps menu, I can just input a password to access Chrome. I heard of a program called Game Protector that can do just that, but I couldn't find a portable version of it that could do it no matter what computer I'm using. If anyone knows of anything that could help, it'd be pretty great and make me feel better about bringing my USB drive with me wherever I go. Thanks!