Depends on who's sitting behind it. There is no such thing as 100 percent security. But let me give you a good tip: in the security industry, things aren't measured by features or by marketing, but by how expensive it is to extract the data with the right criminal forensics. And if anyone is of the opinion that this doesn't work with various protocols, then maybe they should spend a bit more time looking into deep packet inspection and network traffic, because the answer they'll find is going to surprise them ;)