Bitcoin Forum
December 14, 2017, 04:17:54 PM *
News: Latest stable version of Bitcoin Core: 0.15.1  [Torrent].
 
   Home   Help Search Donate Login Register  
Pages: « 1 2 [3] 4 »  All
  Print  
Author Topic: I'm BIP38 curious, please help me out!  (Read 7873 times)
Hamuki
Legendary
*
Offline Offline

Activity: 1022


View Profile
April 11, 2015, 06:56:23 PM
 #41

Can anyone here teach me a bit about this BIP38 cracking?
I want to learn a bit about it Smiley

1513268274
Hero Member
*
Offline Offline

Posts: 1513268274

View Profile Personal Message (Offline)

Ignore
1513268274
Reply with quote  #2

1513268274
Report to moderator
1513268274
Hero Member
*
Offline Offline

Posts: 1513268274

View Profile Personal Message (Offline)

Ignore
1513268274
Reply with quote  #2

1513268274
Report to moderator
1513268274
Hero Member
*
Offline Offline

Posts: 1513268274

View Profile Personal Message (Offline)

Ignore
1513268274
Reply with quote  #2

1513268274
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1513268274
Hero Member
*
Offline Offline

Posts: 1513268274

View Profile Personal Message (Offline)

Ignore
1513268274
Reply with quote  #2

1513268274
Report to moderator
1513268274
Hero Member
*
Offline Offline

Posts: 1513268274

View Profile Personal Message (Offline)

Ignore
1513268274
Reply with quote  #2

1513268274
Report to moderator
1513268274
Hero Member
*
Offline Offline

Posts: 1513268274

View Profile Personal Message (Offline)

Ignore
1513268274
Reply with quote  #2

1513268274
Report to moderator
minimalB
Donator
Hero Member
*
Offline Offline

Activity: 670


View Profile
May 19, 2015, 09:49:19 PM
 #42

Is there anyone working on last remaining private key or did you give up?
digicoinuser
Legendary
*
Offline Offline

Activity: 1064



View Profile WWW
May 19, 2015, 11:08:13 PM
 #43

Is there anyone working on last remaining private key or did you give up?

The wallet still has 0.5BTC, I would surely think there is incentive to crack it.   Smiley


             ▄████████████████████████████████████████████████████████████▄
            ██                          ▄▄▄▄▄▄                           ██
           ██  ██████                ▄██████████▄     ████████████████████▀
          ██  ████████             ▄████▀   ▀████▄    ████▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
         ██  ████  ████           ████▀       ▀██▀    ████
        ██  ████    ████        ▄███▀                 ████

       ██  ████      ████       ███▀                  ████▄▄▄▄▄▄▄▄▄▄
      ██  ████        ████      ███                   ██████████████
     ██  ████          ████     ███▄                  ████▀▀▀▀▀▀▀▀▀▀

    ██  ████████████████████    ▀████                 ████
   ██  ██████████████████████    ▀████▄        ▄██▄   ████

  ██  ████                ████     ▀████▄   ▄████▀    ████▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
 ██  ████                  ████      ▀██████████▀     ████████████████████▄
  ██                                    ▀▀▀▀▀▀                           ██
   ▀█████████████████████████████████████████████████████████████████████▀

║║
║║
║║
toodamntired
Sr. Member
****
Offline Offline

Activity: 418

Available for Writing & Coding Jobs


View Profile
May 20, 2015, 04:29:39 AM
 #44

Okay, total Newbie question coming.... ready for it?... wait, wait, wait.... before i ask and ridicule myself, let me at least state that I had absolutely Zero knowledge of anything more difficult than very basic html until I started school recently for programming, so with that being said...

Where the hell do you go to even find the wallets so you can crack them?

That's what I don't get about offline wallets.... I get taking the btc offline for storage; I get sweeping/importing it back online.... but where is the hub, the port, the dock, the space station?!?!?!?

See, total Newb question...
spazzdla
Legendary
*
Offline Offline

Activity: 1386


View Profile
May 20, 2015, 06:56:37 PM
 #45

People can't crack a 5 char pass and they thing they'll get into my 25+ char pass..  Funny.

This is a sweet idea non the less.. tempted to add a little more BTC to inspire more people.
spazzdla
Legendary
*
Offline Offline

Activity: 1386


View Profile
May 20, 2015, 07:02:45 PM
 #46

Okay, total Newbie question coming.... ready for it?... wait, wait, wait.... before i ask and ridicule myself, let me at least state that I had absolutely Zero knowledge of anything more difficult than very basic html until I started school recently for programming, so with that being said...

Where the hell do you go to even find the wallets so you can crack them?

That's what I don't get about offline wallets.... I get taking the btc offline for storage; I get sweeping/importing it back online.... but where is the hub, the port, the dock, the space station?!?!?!?

See, total Newb question...

I don't get the question of where is the port/hub/dock...?  What do you mean?

He created a wallet, I assume via bitaddress.org and encrypted it. 
minimalB
Donator
Hero Member
*
Offline Offline

Activity: 670


View Profile
April 06, 2016, 08:17:04 AM
 #47

One year went by and 3rd wallet is still loaded with bitcoin : )

I decided to keep this experiment going for another year. I've also added extra 0.5BTC and updated the OP.

In case this wallet is not cracked in a year, I'll take back 1BTC and publish the password.

Happy cracking!
minimalB
Donator
Hero Member
*
Offline Offline

Activity: 670


View Profile
April 06, 2016, 11:01:38 PM
 #48

Here is a small password hint: If you divide the number of UPPERCASE letters by the number of lowercase letters you get an integer.

This should give you a nice 35% speed boost!
LoyceV
Legendary
*
Offline Offline

Activity: 966


Howdy


View Profile
June 12, 2016, 09:21:07 AM
 #49

It took ~20 hours on three n1-highcpu-16 machines on Google Compute. Each one did ~50 passwords per second, 150 total.
It cost around $38 overall.
At this rate it would take up to 4 years to crack the Third password. At $38 for 20 hours it's clearly not worth it.

Here is a small password hint: If you divide the number of UPPERCASE letters by the number of lowercase letters you get an integer.
So that means:
0 UP 6 low: 0/6=0: integer
1 UP 5 low: 1/5: nope
2 UP 4 low: 2/4: nope
3 UP 3 low: 3/3=1: integer
4 UP 2 low: 4/2=2: integer
5 UP 1 low: 5/1=5: integer

JasonXG
Hero Member
*****
Offline Offline

Activity: 728


Betcoin.ag


View Profile
June 12, 2016, 05:56:06 PM
 #50

Can you tell us what was/is the first pass?

First password is "BarT".


Wow !! Dude good for you !! Well done !

Thanks OP for doing this its great !

janggernaut
Hero Member
*****
Offline Offline

Activity: 826



View Profile
June 12, 2016, 10:56:18 PM
 #51

Can you tell us what was/is the first pass?

First password is "BarT".


Wow !! Dude good for you !! Well done !

Thanks OP for doing this its great !

Lol? He already did that 1 year ago and this challenge isnt done yet. Theres still 1 wallet ( third wallet) which still didnt got cracked. Damn, i hope i know whats password in third wallet since the prize is high.

minimalB
Donator
Hero Member
*
Offline Offline

Activity: 670


View Profile
June 13, 2016, 08:05:42 AM
 #52

I am also surprised that 3rd wallet is still uncracked. I've got several PMs with "thanks for the money, man!" stating that they will cracked it in a week or two : )
Looks like they miscalculated something...

Anyways... with rising prices and another 10 months to go (2 years total) there is still plenty of time to crack it. Also my hint reduces the time for a brute force attack quite a lot (about 35%).
janggernaut
Hero Member
*****
Offline Offline

Activity: 826



View Profile
June 13, 2016, 08:15:08 AM
 #53

I am also surprised that 3rd wallet is still uncracked. I've got several PMs with "thanks for the money, man!" stating that they will cracked it in a week or two : )
Looks like they miscalculated something...

Anyways... with rising prices and another 10 months to go (2 years total) there is still plenty of time to crack it. Also my hint reduces the time for a brute force attack quite a lot (about 35%).

Your pass in 3rd seems very difficult to cracked, lol. Altough you already gave more hint (35%) , im still no have any idea about the pass.

mmitech
Legendary
*
Offline Offline

Activity: 1106


things you own end up owning you


View Profile
August 29, 2016, 02:46:33 PM
 #54

I didn't read all posts in this thread, but I suggest that you use hashcat, it is the fastest and most developed open source tool for brute-forcing, you can download binaries and read more about it here, The great thing about hashcat is that you can set a cluster (brute forcing pool) of many rigs that have multiple GPUs to crack one password... I've used this software to crack Nokia SL3 Locks and this is the way how I've got into bitcoin in the first place (bought miners from a miner who was selling miners after the first halving).

Sadly, since the amount is only 1 BTC it is not worth my time to try to crack it, maybe in the future when a bitcoin is so valuable that it would justify wasting hash power on it.

Edit: OK you don't have a wallet.dat but you have an encrypted private key so I am not sure about hashcat, it was a couple of years since last time I've used it for Bitcoin so you need to verify this info.
BitcoinSupremo
Hero Member
*****
Offline Offline

Activity: 686


★YoBit.Net★ 350+ Coins Exchange & Dice


View Profile
August 29, 2016, 03:30:46 PM
 #55

Interesting challenge. So I am assuming I am real safe since my password to all of my desktop wallets is the same , 2 words linked together who make sense only to me plus a few numbers who make sense only to me and some special characters who I always use Smiley . 13 letters password, upper and lower case plus special character should take 331 years to crack since one 6 random character password needs 31.34 year to get cracked.

mmitech
Legendary
*
Offline Offline

Activity: 1106


things you own end up owning you


View Profile
August 29, 2016, 03:42:27 PM
 #56

Interesting challenge. So I am assuming I am real safe since my password to all of my desktop wallets is the same , 2 words linked together who make sense only to me plus a few numbers who make sense only to me and some special characters who I always use Smiley . 13 letters password, upper and lower case plus special character should take 331 years to crack since one 6 random character password needs 31.34 year to get cracked.

Humans are horrible when it comes to randomness thus are horrible with generating a safe and random password (if it make sense to you than it could be guessed), not to mention that if you use the same password multiple times for multiple things the risk of being "hacked" becomes really high, it would just take a key-logger or some site/service being hacked (assuming the hacker gets the hashing/salting keys) and they can have access to every place that has the same password.

Usually hackers do hack for the reason of:
   - There is a justified financial gain.
   - To send a statement.
   - Just prove it can be done.
   - Show off their skills (mostly young hackers).

Just try to do the best security practices, even then you are not 100% safe.
Timelord2067
Legendary
*
Offline Offline

Activity: 1330



View Profile WWW
September 08, 2016, 05:58:29 AM
 #57

Interesting challenge. So I am assuming I am real safe since my password to all of my desktop wallets is the same , 2 words linked together who make sense only to me plus a few numbers who make sense only to me and some special characters who I always use Smiley . 13 letters password, upper and lower case plus special character should take 331 years to crack since one 6 random character password needs 31.34 year to get cracked.

Timelord2067!
1234567890123


Coincidence? I think not...  Kiss

[User Generated Mk III] - Known alts of anyone Mk III
SEXCoin Forum Local Languages now available | Broadcast Your RAW Transaction | Get Paid in BitCoin | (NetHack 3.6.0 Hearse V 1.0.6e) | Twitter: @Timelord2067 Retweet ≠ endorsement | Other Forums: #BritishFolk #SFFHCF | Vanity Wallet Generation | Wallet Verified | ? BTC SXC | TAG Ca$h | (USA) Donate Blood today at One Blood dot ORG | £ $ ₹ € ¥ ¢ ? ÷ BTC I am not an escrow service... | My proof quickseller is an Alt of master-P has been deleted by BitCoinTalk - read archived version here:
LoyceV
Legendary
*
Offline Offline

Activity: 966


Howdy


View Profile
September 08, 2016, 06:33:49 AM
 #58

Humans are horrible when it comes to randomness thus are horrible with generating a safe and random password (if it make sense to you than it could be guessed)
I can very easily create a very random password: r7z3gfJ$g)lf*?~3'
I just press the keyboard a few times without looking, to make it more random I used my left hand on my right hand's position too. No way anybody could guess this with a dictionary attack.
But once I create a decent password like this, I can't remember it. And if I can, I will for sure forget it if I don't use it every day.

I'm also "struggling" with the idea how to securely store Bitcoins. Even a hardware wallet ultimately comes down to storing a backup passphrase on a piece of paper. And that piece of paper can be stolen.

Bitcoin Brain Wallets are a special case, you don't need access to any files to be able to brute force it, and you can search for all wallets at the same time. Can you believe the brain wallet thequickbrownfoxjumpedoverthelazydog has received 106 BTC in total?

Thenextweb.com shows some of the brain wallets found by researchers:
Quote
1. say hello to my little friend
4. party like it’s 1999
5. yohohoandabottleofrum
9. {1summer2leo3phoebe
13. blablablablablablabla
I show these Just to show adding a few numbers to words is not enough to stop a brute force attack.

mmitech
Legendary
*
Offline Offline

Activity: 1106


things you own end up owning you


View Profile
September 08, 2016, 06:56:40 AM
 #59

Humans are horrible when it comes to randomness thus are horrible with generating a safe and random password (if it make sense to you than it could be guessed)
I can very easily create a very random password: r7z3gfJ$g)lf*?~3'
I just press the keyboard a few times without looking, to make it more random I used my left hand on my right hand's position too. No way anybody could guess this with a dictionary attack.
But once I create a decent password like this, I can't remember it. And if I can, I will for sure forget it if I don't use it every day.

I'm also "struggling" with the idea how to securely store Bitcoins. Even a hardware wallet ultimately comes down to storing a backup passphrase on a piece of paper. And that piece of paper can be stolen.

Bitcoin Brain Wallets are a special case, you don't need access to any files to be able to brute force it, and you can search for all wallets at the same time. Can you believe the brain wallet thequickbrownfoxjumpedoverthelazydog has received 106 BTC in total?

Thenextweb.com shows some of the brain wallets found by researchers:
Quote
1. say hello to my little friend
4. party like it’s 1999
5. yohohoandabottleofrum
9. {1summer2leo3phoebe
13. blablablablablablabla
I show these Just to show adding a few numbers to words is not enough to stop a brute force attack.

When I said humans are horrible at generating random passwords, I've already took in considerations the definition of a password, which is a string that grant you access and which you suppose to be the only one (and the trusted second party and maybe a third party) to know.

No one asked you if you can generate a random string (even then, there is a question about your ability to generate great randomness) btw, hardware wallets are maybe the safest thing we have for now, and of course there is nothing 100% secure/safe, when you break things down there is always a point of failure, but your job is to make the possibility of that happening as low as possible. BTW, I wouldn't recommend brain wallet for anyone.

For a hardware wallet, you can write half of the words on one paper the other half on another paper and just keep them separated.
pvaspecialist
Sr. Member
****
Offline Offline

Activity: 294



View Profile
September 08, 2016, 10:10:29 AM
 #60

It took ~20 hours on three n1-highcpu-16 machines on Google Compute. Each one did ~50 passwords per second, 150 total.
It cost around $38 overall.
At this rate it would take up to 4 years to crack the Third password. At $38 for 20 hours it's clearly not worth it.

Here is a small password hint: If you divide the number of UPPERCASE letters by the number of lowercase letters you get an integer.
So that means:
0 UP 6 low: 0/6=0: integer
1 UP 5 low: 1/5: nope
2 UP 4 low: 2/4: nope
3 UP 3 low: 3/3=1: integer
4 UP 2 low: 4/2=2: integer
5 UP 1 low: 5/1=5: integer
Hints is not enough to find the password.It would very hard to find the password.I divided the number of UPPERCASE letters by the number of lowercase letters I got some numbers.I think password will be  UPPERCASE letters and lowercase letters with integers.Well I will try.
Pages: « 1 2 [3] 4 »  All
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!