A security hole

[00704a-Liber]

In article <544 at fig.bbn.com> rsalz at bbn.com (Rich Salz) writes:
.Every single program that is subject to the "IFS" trick can be
.protected by written a wrapper that sets the environment properly,
.then calls the real program.

But what stops the user from bypassing the wrapper and calling the real
program directly?
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