SETI on Snowden's alien remark: encryption isn't an issue

During a recent podcast interview with Neil deGrasse Tyson, former NSA contractor and whistleblower Edward Snowden made an off-the-cuff remark about aliens and encryption and why the latter might hinder efforts to find such beings. The gist of it was: aliens are probably using encryption, and as such we're likely to miss any messages they send due to that encryption. …