My issue is exactly with how they're marketed and sold. Information theory proves there's an infinite number of ways in which you can codify something. The sub

My issue is exactly with how they're marketed and sold. Information theory proves there's an infinite number of ways in which you can codify something. The subset of encodings that meets the rules imposed by any middlebox is in turn infinite. > they aren’t perfect and are only effective against certain behavior This means that they are only effective against default behavior. Anything else is out of scope for these products, which I think is what @laumars was referring to with "outside the bounds of normal expected operation". Marketing sophisms can be fun, but defining something as a "security product" when it is mathematically proven that there are infinite ways to bypass the provided "security guarantees" is ... simply something I refuse to do.