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Questions tagged [brain-wallet]

36 questions
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5 answers

How safe is a brain wallet?

Edit: The answer is that they are unsafe and have been attacked. Please don't use them! Brain wallets can be created with a (minimum 15 character) pass phrase at https://www.bitaddress.org There are no warnings given on the site about the safety of…
Highly Irregular
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BIP38 or Brain wallet?

I have seen many videos about paper wallets and different ways to store BTC. And I have choose to store using a cold wallet (paper wallet). But I am not sure what option I should choose: a normal BIP38 encrypted paper wallet, or a brain wallet…
Tor
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How do I consolidate all my BTC into a single address?

I'd like to archive all my coins in a single address (specifically the address for a "brain wallet"). What is the most effective way to combine all the outstanding balances into a given address?
makerofthings7
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Is there a way to generate a brain wallet from the command line or console?

Is there complete solution for console to generate brain wallet? Something like: echo "sausage" | xxd -r -p | sha256sum | awk '{print $1}' | rmd160 -x | blablabla I'm read this article:…
Anomalous Awe
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6 answers

Why are brain wallets not secure? People keep saying it, but explain to me why?

Everyone keeps saying brain wallets are insecure. Can someone explain to me WHY? What if I had a brain wallet that is 200 characters long which is the concatenation of all of my family members names along with punctuation's and numbers? How about…
Patoshi パトシ
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Compressed or uncompressed for brainwallet?

When creating a brain wallet, should I choose the compressed or uncompressed version? Why? What happens if I choose the uncompressed version (which is what the official client uses, right?), and someone sends coins to the compressed address? Will I…
ChocoDeveloper
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How long would it take to crack an 8-word brain wallet?

Assuming my private key for a bitcoin wallet is derived from SHA256(passphrase) and the passphrase is 8 words long, how long would it take the average attacker to crack my bitcoin wallet through a bruteforce dictionary attack? Assume there are no…
DavyJonesFootLocker
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How does one create a brain wallet from a seed using SHA256?

How does one create a brain wallet from a seed using SHA256? Is this possible? Could you please explain using the example seed "coinbase is awesome" (no apostrophes)? What is the resulting address?
user289394
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Would it be wise and extra secure to use non-ascii characters in a brain wallet?

What are some pitfalls if you use non-standard ascii characters in your brainwallet? Say if you were to use asian language characters? Or even extended ascii characters…
Patoshi パトシ
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3
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The warpwallet challenge 2

here you can find a public challenge aimed to brute force a brain wallet private key, derived from 8 char long [a-zA-Z0-9] passphrase with a salt of "a@b.c". Is it possible to adapt an hashing hardware to solve this? (Such as GPU)
cesko80
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Private Brain Key Generation and Public Address Not Matching Java

I am trying to generate a public and private key set from a input string in Java. (Yes I am aware this can be a dangerous practice) I am using bitcoinj for a outside library. I currently have: //public key generation from private key static String…
John Down
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Is this brainwallet approach safe enough?

Let's suppose I derive a private-public keypair from a passphrase like this : long_and_complex_enough_but_yet_easy_to_remember_passphrase Now I wish to generate 100 more keypairs using same passphrase, so I append consecutive numbers :…
Gustavo
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What is the equivalent of cold storage or paper wallet for NXT?

I want to be able to secure my NXT in cold storage. What are some ways of doing this? Since NXT is only accessible via a brain wallet, I can just store the passphrase on a paper, but what if I wanted to see it as a watch-only address? Is that even…
Patoshi パトシ
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Can ASIC miners easily be used to guess brainwallet passphrases?

After reading the Bitcoin wiki page for brainwallets it seems to me that mining equipment can be used to brute force brainwallet passphrases. Is this correct? "...so hackers can collectively try multiple trillions of passwords every second in the…
Anders Braüner Nielsen
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How to create a brainwallet with bitcoinjs?

This is how to create a brainwallet with bitcore const Bitcore = require("bitcore-lib"); // const Mnemonic = require("bitcore-mnemonic"); // https://bitcore.io/api/lib/crypto let brainsrc= 'satoshi' let input = new Buffer(brainsrc) let hash =…
TSR
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