asciilifeform: 'The advertised unit is a keychain that plugs in through the headphone jack of a mobile device, meant to interact closed-source app to provide impenetrable crypto. This crypto is said to use a one-time pad (OTP) system. The design, photos, prototype, and social networking vibe feel all too similar to the vaporware you’d expect a San Francisco based startup of 5 college students to poorly slap together and unload to unsuspecting ven

asciilifeform: mircea_popescu: frequency hopping is a solved problem in 1980s, you use blum-blum-shub (or variant) if using public key crypto; or same otp as for everything else, if otp.

asciilifeform: or, elsewhere, for, say , otp gen.

asciilifeform: to briefly revisit upstack, http://btcbase.org/log/2017-03-23#1631333 these suffer charge leakage ( like ordinary flash rom ) ; actual otp -- theoretically good for centuries. ☝︎

asciilifeform: (oh imho a future otp rom, if anyone finds himself sitting on a throne, and wants to make one, ought to have not one but TWO fuses per bit. so that nobody can turn a 1 into a 0 later by blowing an unblown fuse. so you'd have 10 -> 1; 01 -> 0; 11 -> dead cell, ergo dead chip; 00 -> blank cell, only found on blank (new) chip.)

asciilifeform: for instance, i wanted to make FUCKGOATS in otp. no dice.

asciilifeform: the supposed otp roms you can buy now, are actually eproms without the quartz window. ☟︎

asciilifeform: every couplea months i do an 'can haz otp rom?' and answer, as always, is 'nope', not at any price, simply not made in past 30 yrs.

asciilifeform: ben_vulpes: 0 provable improvements on otp.

asciilifeform: extensions work entirely fine on otp rom

asciilifeform: (outside of otp.)

asciilifeform: (finishing touch on the otp subthread : the mega-virtue of steel wire vs magnetic tape, is that you can heat it to its curie point for rapid-zapping, without creating smoking, melted mess. so good emergency erase -- just put current through the spool.)

asciilifeform: (there is no conceivable reason to put otp on expensive, non-disposable random-access disks, other than not having anything better)

asciilifeform: btw magnetic tape really shines in otp-land. it costs a penny a GB, and you can trivially write two tapes identically with same head (plugged into rng naturally), AND -- bonus -- can destroy it immediately when it comes out of read head.

asciilifeform: mircea_popescu: 'quantum communication' is golden toilet nonsense, for the cost of building the link, you can perma-sync a thousand years of OTP.