It consists of just one file and doesn't need to be installed. Lockimage will convert any picture into a "password protected executable," which means the file will open on any PC without the Lockimage program. This means, however, the modified file is no longer considered an image file, so this may not be the right solution for some.
Lockimage is similar to Locknote, which uses a similar method of locking files. It's also a Windows-only application, and it's probably best to use this against non-hacker types. With the program being open-source, the recipe isn't exactly a secret.
[via Life Rocks 2.0]
