It <i>is</i> possible for sets of <i>very few</i> people to communicate in ways the NSA could never break. Examples: DH&#x2F;RSA with ~2^14bit keypairs, OTP, etc. It&#x27;s <i>much harder</i> on a large scale, but in the end, I think it&#x27;s doable.<p>The NSA can build a giant supercomputer&#x2F;ASIC system&#x2F;FPGA grid, but they&#x27;re not going to factor a 2^14bit prime unless they have working quantum.<p>The only problem then is, unfortunately, having correct, secure, and non-tampered-with implementations of all the requisite libraries.