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Topic: Can my Bitcoin be stolen (Read 4481 times)

hero member
Activity: 588
Merit: 500
Will Bitcoin Rise Again to $60,000?
June 09, 2014, 09:59:32 AM
Obviously they can be stolen but it's only cause you would've done something wrong if that were to happen.
full member
Activity: 196
Merit: 101
June 09, 2014, 09:35:04 AM
You could make multiple cold storage wallets with different passwords and store them in different geographical locations.
legendary
Activity: 910
Merit: 1000
June 09, 2014, 06:22:30 AM
No matter what you BTC can be stolen.

Well, that is indeed true.

Even for a paper wallet, your wife or your son could stole it from your safe (if they know your safe's password).
And for offline wallet, they could stole your whole HDD (if they know your wallet's password) Tongue
newbie
Activity: 4
Merit: 0
June 09, 2014, 01:53:45 AM
i think yes.it is because if any one use your pc or your computer hacked then may be they stole your bitcoin and one thing that i have read about wallet id.if your install new windows and forget to backup then you will lost all your money from the wallet.may be i am wrong but in my knowledge this is true..
sr. member
Activity: 266
Merit: 250
June 09, 2014, 12:03:19 AM
I just installed a bitcoin client on my PC , a was thinking before i download my wallet from blockchain.info, If someone has access to my PC or if i am infected by a virus will this compromise allow my bitcoin to be stolen?

No matter what you BTC can be stolen.

The question is, do the precautions lower the chances of your coins from being stolen enough?

legendary
Activity: 1302
Merit: 1008
Core dev leaves me neg feedback #abuse #political
June 08, 2014, 09:18:22 AM
What is the most safe way to store coin? I hear people say cold storage.. I dont want to use paper printouts. Can I put the wallet on an external hard drive and remove it + the original wallet from my computer so its now only stored on a drive that cant be accessed unless I plug it in? If so what files do I put on the wallet to ABSOLUTELY guarantee i can bring them back up on my PC any time? I was using multibit but on advice from a friend I got bitcoin core which took like 3 days to sync. Can I back it all up so I don't have to sync every time?

If you don't like downloading the whole block chain you can use electrum cold storage, doesn't require a paper printout, in fact you can restore your wallet from a secret 12 word seed.
newbie
Activity: 1
Merit: 0
June 08, 2014, 03:14:43 AM
What is the most safe way to store coin? I hear people say cold storage.. I dont want to use paper printouts. Can I put the wallet on an external hard drive and remove it + the original wallet from my computer so its now only stored on a drive that cant be accessed unless I plug it in? If so what files do I put on the wallet to ABSOLUTELY guarantee i can bring them back up on my PC any time? I was using multibit but on advice from a friend I got bitcoin core which took like 3 days to sync. Can I back it all up so I don't have to sync every time?
sr. member
Activity: 294
Merit: 250
June 08, 2014, 12:25:20 AM
I just installed a bitcoin client on my PC , a was thinking before i download my wallet from blockchain.info, If someone has access to my PC or if i am infected by a virus will this compromise allow my bitcoin to be stolen?

Put a really long password on it, it would be almost impossible to hack then...
hero member
Activity: 614
Merit: 500
June 08, 2014, 12:23:29 AM
Is there a newbie version way to setup the paper wallet.

The 10 steps in the coindesk article (http://www.coindesk.com/information/paper-wallet-tutorial/) should be pretty easy to follow.
sr. member
Activity: 350
Merit: 250
'Slow and steady wins the race'
June 07, 2014, 10:45:11 PM
I just installed a bitcoin client on my PC , a was thinking before i download my wallet from blockchain.info, If someone has access to my PC or if i am infected by a virus will this compromise allow my bitcoin to be stolen?

Yes, it is always possible that your BTC can be stolen. This is true no matter what precautions you take, although certain precautions will make it be less likely that your coins will be stolen.

If you use a sufficiently strong password if using Bitcoin-QT or multibit then your chances of BTC theft will be reduced.

The safest way to protect your coins in a "hot wallet" form would probably be blockchain.info with 2fa enabled, blocking tor exit nodes and having a strong password and a strong sending password.

The safest way to store your coins via "cold storage" is probably a paper wallet that is encrypted (that is that gives you what is essentially a private key, but you need a password to make it usable). You should store your paper wallet both in paper form and in a USB stick/drive (to prevent issues with the ink faking on the paper) and store it in a safety deposit box (it may be advisable to use two boxes at different banks in the event of a robbery/fire at the bank.
sr. member
Activity: 406
Merit: 250
Bitcoin Mixer: https://BitLaunder.com
June 07, 2014, 05:49:41 PM
Is there a newbie version way to setup the paper wallet.

Like a youtube tutorial, or the blockchain one.
newbie
Activity: 30
Merit: 0
June 07, 2014, 11:13:41 AM
Im always so "lucky" that im sure some shit will happen. The security issue worries me the most and deters me from getting bitcoin. Sad
sr. member
Activity: 476
Merit: 256
June 06, 2014, 10:47:45 AM
definetly good advice about setting the password. so many people who get hacked seem to never have a password. I think its not mandatory passworded by default as to many newbies might forget passwords. silly reason if you ask me... but noone did Sad lol
It couldn't be 'mandatory' as there are many different clients, I assume you're talking about QT though.
legendary
Activity: 910
Merit: 1000
★YoBit.Net★ 350+ Coins Exchange & Dice
June 06, 2014, 09:43:10 AM
definetly good advice about setting the password. so many people who get hacked seem to never have a password. I think its not mandatory passworded by default as to many newbies might forget passwords. silly reason if you ask me... but noone did Sad lol
sr. member
Activity: 476
Merit: 256
June 06, 2014, 07:33:25 AM
Cold storage for large amounts of bitcoin, password on your wallet if you're not storing a large amount.
sr. member
Activity: 252
Merit: 250
June 06, 2014, 06:13:48 AM
They always can be stolen, unless you use some smart cold storage
In general, this is safe advice.
full member
Activity: 154
Merit: 100
June 03, 2014, 09:12:51 PM
They always can be stolen, unless you use some smart cold storage
full member
Activity: 196
Merit: 100
May 30, 2014, 06:41:14 AM
I have now come to the conclusion that there is nothing that I can do to make a secure paper wallet. Surely any combination of numbers/letters/words etc will be guessed by some supercomputer sometime?



Imagine, you are really urgent for a few BTC, do you take your time to type the 64 characters and few words? Wouldn't it be better if you scan your paper wallet and put in a few letters and get your BTC instantly? Even if it is that secure, you are sure to get a few letters wrong in the 64letters and a few words, you might not even be able to remember it.
-ranochigo

I can't imagine needing to access my BTC that urgently & I think I will have the time to type in the numbers & characters. And I'm not trying to remember it; I have it stored securely in several different locations, so I'm not worried about it being accessed physically.
legendary
Activity: 3038
Merit: 4418
Crypto Swap Exchange
May 30, 2014, 05:40:47 AM
Although I followed the advice given on another forum & rolled dice, I'd have preferred 64 characters chosen from anywhere on the keyboard, even if they weren't as 'random'. Surely they'd have been harder to bruteforce?

Here's the advice I followed:

http://www.reddit.com/r/BitcoinWallet/comments/1p6y5c/secure_paper_wallet_tutorial/
That works too, I guess it is also as secure. But I think your mouse strokes are even more random, just in case.
legendary
Activity: 3038
Merit: 4418
Crypto Swap Exchange
May 30, 2014, 05:38:26 AM
I have now come to the conclusion that there is nothing that I can do to make a secure paper wallet. Surely any combination of numbers/letters/words etc will be guessed by some supercomputer sometime?

Not at all. Combinations grow exponentially large, much too big for supercomputers.

Flip a coin 128 times, you have 2^128.

That's about 340 trillion trillion trillion combinations,
Each of which would have to be checked by doing a complete
Sha256 hash.

No computer could do it in any mortal time frame.

Roughly a billion seconds ago, Jesus walked the earth.


So do you think my 64 dice rolls followed by a few words is sufficient?
IMO, a person could bruteforce your 64 dice rolls and a few words in a few months or even days. And are you sure you can spend the time to type those 64 letters and a few words? You can easily forget it.
-ranochigo

64 dice rolls is 6^64.  that's on the order of 2^160.  You can't brute force it even if you had a million billion years.
It has nothing to do with opinions!  

That's this many combinations: 1461501637330902918203684832716300000000000000000

Anyone who says you can brute-force that doesn't realize how BIG that really is.


Imagine, you are really urgent for a few BTC, do you take your time to type the 64 characters and few words? Wouldn't it be better if you scan your paper wallet and put in a few letters and get your BTC instantly? Even if it is that secure, you are sure to get a few letters wrong in the 64letters and a few words, you might not even be able to remember it.
-ranochigo
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