Two things about this odd quote, which dances on the edge of the Orwellian "nothing to hide" argument:
1. I'd put the odds that current president has in fact stored the nuclear launch codes on a "consumer product" at 50:50. He's shown a shocking disregard and disdain for protocol. The way in which diplomacy is carried out through Twitter suggests he's not capable of evaluating the threats posed his uses of consumer-grade technology.
2. Barr assumes a threat model involving petty criminals. The real threat is the US federal government, which has demonstrated repeated disregard, under multiple administrations, for search and seizure boundaries set by the Constitution.