All encryption can be broke - it is just the stronger and more robust the encryption, the more resources and time it takes to break. Then you get into export/import regulations. If you want a really strong encryption and you might find your product controlled under the DOS ITAR regulations and that cuts your market potential and drives up price. Design the product so that it will fit under the DOC encryption regulations and it has to be a less robust scheme due to the stated purpose immediately above (holding back military secrets vs. promoting commerce). In today's tech world I wouldn't trust any encryption for more than a few minutes - 128 bit over the Internet and just enough time to make a purchase and get out. I don't trust wireless router encryption because you can buy encryption breakers on the Internet. The longer the connection, the more chance someone can break it.
Out of curiosity, what are the exact rules on that sort of thing? I don't design my encryption systems purposefully to be weak, but rather to be quickly implementable on a cheap micro. The data are passed through a mixture of exclusive-ors, linear shuffling, and non-linear transformation, which are the ingredients of a strong crypto system, but I suspect my transformations probably have some exploitable weakness (they were generated by using a QBASIC random number generator and then arbitrarily flipping a few numbers around by hand).
" I don't trust wireless router encryption"
Sure. I don't know the technical side of this, but I figure, at least with landline connections, somebody has to tap into a network somewhere or break into your home or office, etc. In a network, there is some kind of generalized protection. Breaking into a home or office is a lot of work.
Picking up wireless signals on the other hand, is easy. There are probably people out there just grabbing any wireless signal that comes along to see what they can to get out of it.
That's how I look at things.