I initially proposed the PATRIOT phone, envisioning this. It'd feature RSA cryptography with no back doors or key escrow. With the right marketing strategy, a satisfactory product, and reasonable price points, it shouldn't be difficult to sell several thousands of such devices. At that point, the device becomes an impediment to large scale surveillance. If even 1% of network traffic were encrypted, it would be impossible to capture that volume of traffic for cryptanalysis -- there simply aren't enough supercomputers.