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Author Topic: HOWTO: create a 100% secure wallet  (Read 249550 times)
extratw
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August 28, 2013, 06:35:37 PM
 #2461

Thanks, amazing guide Smiley
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branefreez
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August 28, 2013, 08:45:01 PM
 #2462

Thank you for the guide on how to secure my cryptocoin wallet! It was easy to use, and is very reliable.

ANC: AKsQ2xutugLvSEdtnZ517zNh77ccBUyT9H | BTC: 14qShfJD8pb3VYoCXrQTEPZAFidQizt8YV | MNC: MBtSaS2j7bcDHvmZBiH6PPxVEb641exXYF | LTC: LQGeupJtMc6W245Ps9Awad2SWP5ETKbuwS |
aelpop
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August 29, 2013, 12:48:03 AM
 #2463

excellent guide
Y.Job
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September 07, 2013, 11:03:01 PM
 #2464

what i don't understind how i'm going to receive or send this coin if i didn't wait for the bitcoin-qt to download all the block, and how he gonna do that if its in a CD.

sweetne$$
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September 08, 2013, 12:51:08 AM
 #2465

I appreciate all the tips given in this thread, I'm newer to the scene so this really helps me out.
AndrewWilliams
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September 12, 2013, 06:47:55 AM
 #2466

If you want true security in addition to the BitCoin software your are using, you need to use the following software to prevent malware, trojans, and viruses from giving someone backdoor access to your computer. All the encryption and passwords in the world will not help you if you computer is infected. BTC



1. Anti-Keylogger
This will prevent a hacker from capturing your passwords as you enter them to decrypt wallets and posting payments.
Key Scrambler - Free and Paid editions. You need to have the paid edition to encrypt your typing using a software wallet and not just your browser. Well worth it IMO.
http://www.qfxsoftware.com

2. VPN Service
This will put a buffer and prevent hackers from having easy access to remotely control your computer if it infected.
Many available. Private Internet Access and Mulavad are recommended by many.
http://www.privateinternetaccess.com , https://www.mullvad.net/en/

3. Firewall and Anti-Virus
Self explanatory. I also recommend Malwarebytes Anti-Malware to detect malware that may not be picked up by most anti-virus software. Free as well.

4. Privacy Browser
Many people think that if you have a proxy or VPN you are immune from tracking. This could not be further from the truth. Browser fingerprinting allows an unscrupulous person to track the websites you visit and monitor your movements online. In a nutshell browser fingerprinting is the method of IDing people online, only needing 21 bits of identification. With 21 bits of identification, a person can be pinpointed with near 100% accuracy by their browser. These points include your OS, browser, any browser add-ons you use, your screen resolution, http header tags, timezone, system fonts, and many more things you probably didn't know could be accessed by a website. THIS IS WHY using Firefox and adding a few privacy addons DOES NOT WORK! If anything, using add-ons, it INCREASES your ability to be tracked. The question becomes, how do we prevent cookies, javascript, and flash from tracking us without using add-ons that contribute to bits of identification?

Test yourself:
https://panopticlick.eff.org/
http://ip-check.info/?lang=en

Solution:
JonDoBrowser: A special build of Firefox that has all privacy essential addons, disables flash cookies, and uses the TOR network to proxify your websurfing.
The best part is that JonDoBrower has the same exact browser fingerprint for ever person who uses it. So you browser fingerprint is no longer unique; it is shared by thousands! The more people use it, the greater the factor of anonymity. It will bring you to under 10 bits of identification. Yes, it is free.
https://anonymous-proxy-servers.net/index.html



Some trust in chariots, and some in horses. Psalm 20. 7
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shuttleclock
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September 16, 2013, 01:22:30 AM
 #2467

More secure = less comfortable to use,
Less secure = more comfortable to use Tongue

what i don't understind how i'm going to receive or send this coin if i didn't wait for the bitcoin-qt to download all the block, and how he gonna do that if its in a CD.
As far as I know, you can always receive payment as long as you have your bitcoin address, hence no need to wait for the client to download ll the block.

And if downloading all the blockchain sounds annoying for you, how about use some lightweight wallet instead, like Multibit? Smiley
CYPER
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September 22, 2013, 11:29:19 PM
 #2468

OK, so for receiving coins you don't have be connected to the internet, in fact you don't need to do anything as long as you have your wallet secured.

But what about sending coins? - I assume internet connection is needed in order to broadcast the transaction, but do I need to download the full blockchain in order to successfully send coins?
Can I just open a fresh client for less than a minute, send some coins and close it immediately after that? Is that enough time for the transaction to appear in the blockchain?



Also I would like to transfer the few coins I have to a new wallet, because my current one is on my Windows machine encrypted and I'd rather not open it in this environment, just in case there is some malware waiting for it. Is this the right procedure:

1 - I fire up a LiveCD, install a bitcoin client, get some new addresses, write them down, backup wallet.dat.
2 - Again load LiveCD and copy my original wallet.dat to be used with the bitcoin client, but this time with an internet connection, so I can send the coins to an address from step one.
3 - Delete original wallet.dat and keep the one created in step 1.

Did I miss anything?

If this post helped you and you feel generous you know what to do: 1P9tXFy9bVgzrfPGeV7F8np26ZtFdCCWvz
CYPER
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September 23, 2013, 01:13:23 PM
 #2469

Anyone?

If this post helped you and you feel generous you know what to do: 1P9tXFy9bVgzrfPGeV7F8np26ZtFdCCWvz
bouc
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September 23, 2013, 02:48:50 PM
 #2470

maybe, keep the one created at step 2, would be logic, no?
CYPER
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September 23, 2013, 03:18:12 PM
 #2471

maybe, keep the one created at step 2, would be logic, no?

Do I need it when all the coins from it will be transferred to the new wallet created in step 1?

If this post helped you and you feel generous you know what to do: 1P9tXFy9bVgzrfPGeV7F8np26ZtFdCCWvz
dishwara
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September 23, 2013, 03:34:35 PM
 #2472

OK, so for receiving coins you don't have be connected to the internet, in fact you don't need to do anything as long as you have your wallet secured.
For both sending & receiving coins you need to connect internet.
For to just check the balance in a particular address you dont need to connect your wallet software to internet.
you can just check the address in blockchain.info for balance

Quote
But what about sending coins? - I assume internet connection is needed in order to broadcast the transaction, but do I need to download the full blockchain in order to successfully send coins?
Yes
Quote
Can I just open a fresh client for less than a minute, send some coins and close it immediately after that? Is that enough time for the transaction to appear in the blockchain?
No
CYPER
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September 23, 2013, 03:42:35 PM
 #2473

For both sending & receiving coins you need to connect internet.

What do you mean by "receiving"?
If I have created a wallet and copied the receiving addresses on a piece of paper I don't really need internet connection to receive coins.
I can just give the address to someone and that's it.
Now If I want to spend these coins then I will need internet, but that is sending, no receiving.

If this post helped you and you feel generous you know what to do: 1P9tXFy9bVgzrfPGeV7F8np26ZtFdCCWvz
Reaper3
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September 23, 2013, 05:21:25 PM
 #2474

100% is a strong statement
nobbynobbynoob
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September 23, 2013, 05:37:20 PM
 #2475

100% is a strong statement

True, but it is a reasonable approximation, given that, if one follows proper procedure for creating an offline wallet, there is essentially no way to steal the funds besides failure of Bitcoin protocol. Even robbery with violence can be stymied by splitting up private keys or key-access passphrases and storing them in multiple sites. I guess one could try to extort bitcoin via kidnapping and the like, just as with fiat.

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dishwara
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September 23, 2013, 05:53:49 PM
 #2476

For both sending & receiving coins you need to connect internet.

What do you mean by "receiving"?
If I have created a wallet and copied the receiving addresses on a piece of paper I don't really need internet connection to receive coins.
I can just give the address to someone and that's it.
Now If I want to spend these coins then I will need internet, but that is sending, no receiving.
Until you connect to internet, your wallet wont have the coins.
Blockchain shows the address has coins, not in your wallet.
You need to connect to internet, then only the coins will reach your wallet.
CYPER
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September 23, 2013, 05:59:25 PM
 #2477

Until you connect to internet, your wallet wont have the coins.
Blockchain shows the address has coins, not in your wallet.
You need to connect to internet, then only the coins will reach your wallet.

Sorry, but your understanding of how Bitcoin works is wrong.
The wallet doesn't contain any coins Wink
It contains your public and private keys to spend coins, that belong to it.
So basically the blockchain knows your address has some coins and your wallet contains the right to spend them.

So, no you don't need an internet connection to receive coins, but you need internet connection to spend them Wink

If this post helped you and you feel generous you know what to do: 1P9tXFy9bVgzrfPGeV7F8np26ZtFdCCWvz
bwstacker
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September 29, 2013, 09:15:09 PM
 #2478

Wel in the end the only cecure wallet is a downloaded wallet freshly installed not up dated at all And send you coins to that address ,don't update wallet. Wallet dat. can be backed up but do not update the wallet
BTCetera
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November 04, 2013, 03:08:14 PM
 #2479

I think it's safe to summarize this post as: Armory is your home safe and Coinbase is the wallet you take when you get out of the house.

Naturally, the actual solutions hereby named change from time to time, but these two are pretty good options as of Nov 2013. Would someone disagree?
Boris Ent
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November 25, 2013, 03:28:09 AM
 #2480

Crypto currencies are a game-changer.  But, as currently implemented, they are designed to fail.  The proposals here won’t change the out­come.

Simply put: there is no spend password on the private key!

To illustrate: my PGP/GPG private keys are only created and used off­line; printed and stored in an off­site safe.  But, they are vulnerable to replication.  Somebody sitting at a keyboard and hammering out a random string that just may be identical to my original PGP/GPG private key.

So, when somebody finally replicates my PGP/GPG private key they must still crack my random password to impersonate me.  That, is to transact with my key.

The Android Bitcoin flaw proved that the Bitcoin 51 character private key is much easier to replicate.  It starts with the digit 5 and the rest of the key are randomised characters from the Base58 symbol chart on the Base58Check encoding page.

It doesn’t matter if you follow best-practice privacy measures, such as cold storage, paper-wallets, encrypted USB drives, etc.  No passphrase, no security.

It won’t be long before some script-kiddy writes an algorithm to replicate all possible Bitcoin private keys.  Run them through the JavaScripts available on­line that calculate the individual public keys.  Query sites such as Bitcoin Block Explorer for addresses with transaction histories.  Download the JavaScript to create secure offline Bitcoin transactions.  Then, broadcast the transactions.

All without touching a single encrypted wallet.dat.
––––
REFERENCES
····
The Android Bitcoin vulnerability explained
  http://blogs.avg.com/mobile/android-bitcoin-vulnerability-explained/
····
Base58Check encoding
  https://en.bitcoin.it/wiki/Base58Check_encoding
····
Query private wallet keys at
  https://www.bitaddress.org
····
Watch wallets online at
  https://blockchain.info/address/
····
Retrieve transaction history at
  http://blockexplorer.com/q/mytransactions/
····
Create offline send with
  http://www.howtovanish.com/images/offline-transactions.zip
····
Broadcast spend at
  http://blockchain.info/pushtx
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