tmsr - Search: otp

asciilifeform: ( and , jaw-droppingly, just about every book 'on crypto' omits the otp proof. that very same, that constitutes the alpha and the omega of what's actually proven in the subject at all )

asciilifeform: you thereby get a 'ratchet'. which afaik is the only hard strength result in all of crypto aside from von neumann's otp proof...

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a111: Logged on 2017-10-06 23:13 mircea_popescu: basically the scheme is, you rsa a random bitfield, then you expand that into as much otp as you want by doing recursively Fi = hash(bitfield + Fi-1). there's a limit on i, obviously, which can be set to 1.

diana_coman: I meant the choice of specific, concrete way to expand the original bitfield i.e. "reuse the otp"

asciilifeform: for so long as you're actually using otp (i.e. 1 byte of key used for exactly 1 byte of payload) it's the only logical option

asciilifeform: what's hard re using otp ? it's a xor

asciilifeform: iirc you were gonna use mircea_popescu's algo ( use rsa to send otp pages, then later use'em )

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ang-st: needed some time to figure out otp stuff

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asciilifeform: ( and can just as easily substitute ~actual~ otp in place of the prng, if you like , the exact mechanics of generating the noise waveform are irrelevant other than for the fact that they must be repeatable )

asciilifeform: the prongs thing is quite like the xor-otp structure removal transform from the ciphers thread

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hanbot: Performs the previously requested command associated with the decrypted `otp`. << nah, actually, i think that's fine.

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mircea_popescu: teaching the kid to otp will surely give him something to blow schoolmates out of water.

asciilifeform: diana_coman: imho otp is actually simple enough to teach a kid

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ccmtacks: mircea_popescu, during the withdraw process, if I don't receive any response from deedbot, when I give him the encrypted OTP, does it mean that I have to do all the process again ?

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ccmtacks: I got decryped otp

trinque: anyhow ccmtacks gotta pass the decrypted otp back to deedbot like with !!up

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BHopkins: It just says "Get your OTP" and then gives me a key. What do I do with that key?

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asciilifeform: the 1 thing we have from von neumann's proof, however, other than otp per se, is the xor primitive, which provably composes N ~independent~ items of variant hardnesses, into the hardness of hardest input.

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asciilifeform: which then gets used as otp per mircea_popescu's original algo.

asciilifeform: see the otp thread

asciilifeform: each one in particular runs as mircea_popescu's old algo does. the otps, however, are xored to form the otp that gets used in the end.

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