I am working on a software project that requires the use of a setup program. The one my company is using is InnoSetup.
In their downloads page (http://www.jrsoftware.org/isdl.php) towards the bottom, under the section titled Encryption Module it says:
"For legal reasons, encryption code is not built into Inno Setup. You must download a separate "encryption module" if you wish to utilize Inno Setup's encryption capabilities..."
What legal reasons are they referring to?