note moritz <blockquote>So you're saying it's not doable, right?</blockquote> <p>Not doable on a technical level, no. Unless you're willing to go the software-as-a-service route.</p> <blockquote>Not sure why you think the same even for C where all the user gets is the binary and there's no chance of him changing the code!</blockquote> <p>What makes you think that it's impossible to change binaries? Disassemblers, debuggers and other tools exist.</p> <p>There's a whole industry around DRM, digital rights/restriction management, and basically all the protections against copying have been cracked. And they all come in binary files, one way or another. <!-- Node text goes above. Div tags should contain sig only --> <div class="pmsig"><div class="pmsig-616540"> [http://perl6.org/|Perl 6 - the future is here, just unevenly distributed] </div></div> 988600 988649