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Encryption is essential.
Haven't seen it, but Echelon is no big surprise. The best answer to Echelon (and any still-secret similar endeavors) is _routine_ end-to-end _strong_ encryption of all data. Yes, it's a good bet that the TLAs can break any given message. But it seems unlikely they can break them all and do the kind of routine eavesdropping attributed to Echelon (unless you give them a hand in designing or implementing the security, of course).
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