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Author Topic: Calculators of the future - finding public address given private key  (Read 1159 times)
remotemass (OP)
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January 16, 2013, 08:25:47 AM
 #1
Wouldn't it be nice a little hardware just like a calculator, where you could type 256 bits and get the correspondent public address?
I think it would be useful that it had no internet connection and was very cheap... so that a very dumb guy, could know by heart the private key and not needing anyone or anything else to get to know the correspondent bitcoin address.
Also having a document with very clear algorithms explaining it step by step how to do it manually with pen and paper!

Ultimately anything with a keyboard can have a key logger installed and be using communications to tell what was typed but with a cheap calculator like a smart card with chip and solar panel seems safer...
{ Imagine a sequence of bits generated from the first decimal place of the square roots of whole integers that are irrational numbers. If the decimal falls between 0 and 5, it's considered bit 0, and if it falls between 5 and 10, it's considered bit 1. This sequence from a simple integer count of contiguous irrationals and their logical decimal expansion of the first decimal place is called the 'main irrational stream.' Our goal is to design a physical and optical computing system system that can detect when this stream starts matching a specific pattern of a given size of bits. bitcointalk.org/index.php?topic=166760.0 } Satoshi did use a friend class in C++ and put a comment on the code saying: "This is why people hate C++".
remotemass (OP)
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January 16, 2013, 01:44:20 PM
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I was thinking in a smart card design that could make the trick.
The card would have 256 holes, each corresponding to a little solar panel.
The holes could be covered and uncovered using small sliding windows of the plastic card.
And you would have a display and a chip to make the combination of holes/bits of your private key display the correspondent public key.
Of course, it could also become a ludic toy for people that really believe in their luck and are looking for a particular combination to result in addresses they have in mind...

Imagine Bitcoin-Central using this simple design in their debit cards, making them super cool to play around with...
{ Imagine a sequence of bits generated from the first decimal place of the square roots of whole integers that are irrational numbers. If the decimal falls between 0 and 5, it's considered bit 0, and if it falls between 5 and 10, it's considered bit 1. This sequence from a simple integer count of contiguous irrationals and their logical decimal expansion of the first decimal place is called the 'main irrational stream.' Our goal is to design a physical and optical computing system system that can detect when this stream starts matching a specific pattern of a given size of bits. bitcointalk.org/index.php?topic=166760.0 } Satoshi did use a friend class in C++ and put a comment on the code saying: "This is why people hate C++".
crazy_rabbit
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January 16, 2013, 07:46:41 PM
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I'll sell you a slide-rule for 2btc.
more or less retired.
greyhawk
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January 16, 2013, 07:56:12 PM
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Quote from: crazy_rabbit on January 16, 2013, 07:46:41 PM
I'll sell you a slide-rule for 2btc.

Will you also teach him math?
DannyHamilton
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January 16, 2013, 08:24:39 PM
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Quote from: remotemass on January 16, 2013, 08:25:47 AM
. . . so that a very dumb guy, could know by heart the private key . . .

 Huh
notme
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January 16, 2013, 09:21:12 PM
 #6
Quote from: DannyHamilton on January 16, 2013, 08:24:39 PM
Quote from: remotemass on January 16, 2013, 08:25:47 AM
. . . so that a very dumb guy, could know by heart the private key . . .

 Huh

I agree... Huh

How is a very dumb guy going to memorize 256 bits?  Also, how is your "calculator" supposed to help him do that?

What you might be interested in are brain wallets where you memorize a passphrase that can be converted into a private key.
https://www.bitcoin.org/bitcoin.pdf
While no idea is perfect, some ideas are useful.
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