The question that begs to be asked here is, "How many users NEED to search and replace a 250 page document? How many Excel users even know what a Black-Schols analysis is?" Honestly, that's like telling the average user that they need a Cray because it runs weather simulations so much faster than their Macintosh.
Unfortunately, you don't have a chance. There is a little known counterpart to the science of cryptography - the ugly stepchild, steganography.
Steganography is the branch of computer science concerned with hidden communication - not (as encryption) communicating so that others cannot understand - but hiding the existance of communication. If somebody is bright enough to piggyback a couple of bits of data onto emails or (even better) send small strings of data encoded in URLS as GET requests to an imaginary server outside your network . . .
I think you get the point. Against a determined, or at least half-witted, attacker, you are powerless.
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So why bother even trying to secure one? But hey, look at the pretty graphics.
The question that begs to be asked here is, "How many users NEED to search and replace a 250 page document? How many Excel users even know what a Black-Schols analysis is?" Honestly, that's like telling the average user that they need a Cray because it runs weather simulations so much faster than their Macintosh.
Unfortunately, you don't have a chance. There is a little known counterpart to the science of cryptography - the ugly stepchild, steganography. Steganography is the branch of computer science concerned with hidden communication - not (as encryption) communicating so that others cannot understand - but hiding the existance of communication. If somebody is bright enough to piggyback a couple of bits of data onto emails or (even better) send small strings of data encoded in URLS as GET requests to an imaginary server outside your network . . . I think you get the point. Against a determined, or at least half-witted, attacker, you are powerless.