Part of the problem of malicious code, including programs that get in the middle of legitimate exchanges, is that it is difficult for a user to know what a piece of code really does. For example, if you voluntarily install a toolbar, you expect it to speed your search or fulfill some other overt purpose; you do not expect it to intercept your password. Outline an approach by which a piece of code would assert its function and data items it needed to access. Would a program such as a browser be able to enforce those access limits? Why or Why Not?