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Financisto

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BTC⇆⚡⇄BTC

Quote from: ?? on ??

Quote from: Financisto on August 26, 2015, 08:55:44 PM

@unchi

Suggestion: show the generated private key also in compressed format.

You can get the code from bitaddress.org

This would be easy to implement, but I'm not sure if there would be enough demand for it. I prefer to keep the website as simple as possible to avoid confusion. What's the general consensus on this?

I guess it would be more like an add-on to your project.

Not an issue at all...

Some discussions about that: https://bitcointalksearch.org/topic/compressed-vs-uncompresed-private-keys-129652

ryanc

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Activity: 105

Merit: 59

The documentation on the website as to what algorithm brainwallet.io uses is inaccurate.

It says:

Quote

key = scrypt(passphrase, salt, N=2¹⁸, r=8, p=1, dkLen=32)
keypair = generate_bitcoin_keypair(sha256(key))

It's actually:

Quote

key = hex(scrypt(passphrase, salt, N=2¹⁸, r=8, p=1, dkLen=32))
keypair = generate_bitcoin_keypair(sha256(key))

Why are you using uncompressed keys?

lorylore

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Activity: 1470

Merit: 1002

Quote from: ?? on ??

Quote from: lorylore on August 27, 2015, 04:38:49 PM

Quote from: guitarplinker on August 27, 2015, 04:28:56 PM

Quote from: lorylore on August 27, 2015, 03:16:27 PM

Awesome, one more suggestion i was thinking something like this:
snip

He could probably add an option for a fancier image like that. I like how it is now, because like prodigy8 said, it uses very little ink when being printed compared to your suggested design.

Ok then I think adding 2 buttons: 1st let be as it is now "Simple print" with a description that it uses little ink and the 2nd button with a design which use lots of ink inc. color. The design should be good even if the printer is black and white. This is just an idea so the OP can implement it.

Thanks for the suggestions. I will look into making the print page a little prettier, but I think I'd like to do it through CSS and avoid using images.

I think a great design something unique only for bitcoin addresses, yes avoiding images is good too, it can be sometimes not printed in the right way. I wish you good luck.

ryanc

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Activity: 105

Merit: 59

If you're going to print it, just use BIP38 paper wallets. If you're worried about it getting lost, make multiple copies.

prodigy8

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Activity: 532

Merit: 500

Quote from: ?? on ??

UPDATE

You should see some significant performance improvements now. I am using a streamlined scrypt implementation that has a smaller memory footprint, resulting in faster wallet generation and better support for older hardware.

I can see the difference it is much faster than it was before. And try to keep the website simple and let us use less printer ink

lorylore

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Activity: 1470

Merit: 1002

Quote from: guitarplinker on August 27, 2015, 04:28:56 PM

Quote from: lorylore on August 27, 2015, 03:16:27 PM

Awesome, one more suggestion i was thinking something like this:
snip

He could probably add an option for a fancier image like that. I like how it is now, because like prodigy8 said, it uses very little ink when being printed compared to your suggested design.

Ok then I think adding 2 buttons: 1st let be as it is now "Simple print" with a description that it uses little ink and the 2nd button with a design which use lots of ink inc. color. The design should be good even if the printer is black and white. This is just an idea so the OP can implement it.

guitarplinker

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Activity: 1694

Merit: 1024

Quote from: lorylore on August 27, 2015, 03:16:27 PM

Awesome, one more suggestion i was thinking something like this:
snip

He could probably add an option for a fancier image like that. I like how it is now, because like prodigy8 said, it uses very little ink when being printed compared to your suggested design.

lorylore

legendary

Activity: 1470

Merit: 1002

Quote from: ?? on ??

Quote from: lorylore on August 27, 2015, 01:52:21 PM

Quote from: ?? on ??

Quote from: lorylore on August 26, 2015, 04:38:58 PM

This is an update, thank you unchi, you are very kind. It's really hard to remember 12 different words of this kind.
What about to release an update for print

a good design of the printed page?

That's a brilliant idea, and I will definitely implement it. Thank you.

I like that you like my suggestion, finger crossed for the next update. The activity of visitors will increase definitely.

UPDATE

Print button has been added! It just prints out your keys and QR codes. Plain and simple.

Awesome, one more suggestion i was thinking something like this:

prodigy8

hero member

Activity: 532

Merit: 500

Quote from: ?? on ??

Quote from: lorylore on August 27, 2015, 01:52:21 PM

Quote from: ?? on ??

Quote from: lorylore on August 26, 2015, 04:38:58 PM

This is an update, thank you unchi, you are very kind. It's really hard to remember 12 different words of this kind.
What about to release an update for print

a good design of the printed page?

That's a brilliant idea, and I will definitely implement it. Thank you.

I like that you like my suggestion, finger crossed for the next update. The activity of visitors will increase definitely.

UPDATE

Print button has been added! It just prints out your keys and QR codes. Plain and simple.

The difference with bitaddress/org is that here it uses less printer ink. Keep it up

lorylore

legendary

Activity: 1470

Merit: 1002

Quote from: ?? on ??

Quote from: lorylore on August 26, 2015, 04:38:58 PM

This is an update, thank you unchi, you are very kind. It's really hard to remember 12 different words of this kind.
What about to release an update for print

a good design of the printed page?

That's a brilliant idea, and I will definitely implement it. Thank you.

I like that you like my suggestion, finger crossed for the next update. The activity of visitors will increase definitely.

RGBKey

hero member

Activity: 854

Merit: 658

rgbkey.github.io/pgp.txt

Brainwallets are just another form of storing your bitcoin. Humans are known to be notoriously bad randomness generators, but if you can find a good random phrase that you can remember, that hopefully you didn't come up with yourself, that's not out of a book or anything, it can be a novelty way to keep your coins without needing to save a file with your private keys.

They can confiscate your computer but they can't confiscate your thoughts.

Financisto

hero member

Activity: 640

Merit: 771

BTC⇆⚡⇄BTC

@unchi

Suggestion: show the generated private key also in compressed format.

You can get the code from bitaddress.org

ColderThanIce

sr. member

Activity: 373

Merit: 252

Quote from: ?? on ??

UPDATE

A random 12-word passphrase generator has been added to brainwallet.io. It selects words from a list of 1,626 memorable words in a cryptographically random manner. This is a similar process to what Electrum uses for wallet seeds.

Humans are known to be poor entropy sources when it comes to generating random words. This should be a useful functionality for people who have doubts in the security of their passphrase.

Remember to always write down your passphrase!

Is brainwallet.io using the same word list as Electrum, or do you have a public copy of the wordlist you're using if you're using a different list?

lorylore

legendary

Activity: 1470

Merit: 1002

Quote from: ?? on ??

UPDATE

A random 12-word passphrase generator has been added to brainwallet.io. It selects words from a list of 1,626 memorable words in a cryptographically random manner. This is a similar process to what Electrum uses for wallet seeds.

Humans are known to be poor entropy sources when it comes to generating random words. This should be a useful functionality for people who have doubts in the security of their passphrase.

Remember to always write down your passphrase!

This is an update, thank you unchi, you are very kind. It's really hard to remember 12 different words of this kind.
What about to release an update for print

a good design of the printed page?

prodigy8

hero member

Activity: 532

Merit: 500

Congratz unchi for this awesome project, i tried it with a passphrase and salt just one digit and it take some time to generate. And we mostly care about security, good luck in next updates.

Jeremycoin

legendary

Activity: 1022

Merit: 1003

𝓗𝓞𝓓𝓛

We are not responsible for any losses in bitcoin that you may incur for any reason.
I kinda feel cautious with this sentence, especially with the underlined words.

CIYAM

legendary

Activity: 1890

Merit: 1086

Ian Knowles - CIYAM Lead Developer

I think this is not a bad idea and for those who still seem to think it is impossible to create a good brainwallet please note that this one: https://blockchain.info/address/1Au4v6dZacFVsWXeKUMJd99AtyBZeqti2L still has its 1 BTC (that has been there for three years).

Of course if you are going to use a stupid pass phrase then you are going to lose your coins but with a decent enough pass phrase and especially with decent key hardening (500K rounds seems actually over the top but will provide "future proofing") you will be safe from brute forcing.

Financisto

hero member

Activity: 640

Merit: 771

BTC⇆⚡⇄BTC

Quote from: hdbuck on August 26, 2015, 09:44:17 AM

https://rya.nc/defcon-brainwallets.html

No FUDs here please!

LOL

Please read this: http://blog.codinghorror.com/speed-hashing/

HostFat

staff

Activity: 4270

Merit: 1209

I support freedom of choice

Quote from: hdbuck on August 26, 2015, 09:44:17 AM

https://rya.nc/defcon-brainwallets.html

Can you please go somewhere else posting offtopic?
It's clear that you don't understand the difference between this (and Warp Wallet) and the common brainwallet as it was brainwallet.org.

hdbuck

legendary

Activity: 1260

Merit: 1002

https://rya.nc/defcon-brainwallets.html

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