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Author Topic: HOWTO: create a 100% secure wallet  (Read 276122 times)
Kazimir
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June 15, 2012, 03:49:12 PM
 #781

Once I move it to my USB, I can basically have it safe now?

No, you also have to make sure that

  • your USB (or at least your wallet file) is encrypted with a strong password (otherwise, what happens if you lose your USB or it gets stolen?)

  • you have at least one, preferably multiple remote backups somewhere (otherwise, what happens if your house burns down?) and any backup must be encrypted as well (otherwise, what happens if the remote backup location gets hacked / confiscated by the feds / stolen by a fraudulent employee / etc?)

  • you only insert the USB stick in a computer that is guaranteerd free from malware/virus/spyware/keyloggers/trojans/etc (or at least whenever you actually enter your password to unlock the wallet and confirm any payments)

In theory, there's no difference between theory and practice. In practice, there is.
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MassMaster
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June 17, 2012, 07:41:39 AM
 #782

What it sounds like is can make this wallet file; save it on an SD card. Lock it up in my closet.  Then deposit coins to the address associated with the wallet.dat file with out having to take it out of its 'spot' UNLESS i want to pull coins out of my savings?  If so this is awesome! I'm looking forward to setting this up.  Thanks for the post!

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June 17, 2012, 07:45:00 PM
 #783

Thanks for this, very informative
Kazimir
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June 17, 2012, 08:38:47 PM
 #784

What it sounds like is can make this wallet file; save it on an SD card. Lock it up in my closet.  Then deposit coins to the address associated with the wallet.dat file with out having to take it out of its 'spot' UNLESS i want to pull coins out of my savings?  If so this is awesome! I'm looking forward to setting this up.  Thanks for the post!
Correct. Although keep in mind what I wrote above about encrypting the wallet file (even if it's stored on a USB drive or SD card) and remote backups.

In theory, there's no difference between theory and practice. In practice, there is.
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HonorMe
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June 17, 2012, 10:02:13 PM
 #785

Sound advice, im going to work on this myself
KajiMaster
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June 18, 2012, 03:34:10 AM
 #786

I got a 2gb micro sd card salvaged from my old smart phone. I knew it was going to come in handy!

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June 18, 2012, 12:54:14 PM
 #787

Already did that to secure my whopping 11BTC Smiley

Really great tutorial, by the way!
WongthForReal
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June 19, 2012, 02:42:01 AM
 #788

Secured my wallet, thanks.
BBE
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June 19, 2012, 05:01:41 PM
 #789

good read.  Thanks for the sticky Smiley
ALOIS
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June 19, 2012, 05:34:04 PM
 #790

i think just keeping Anti-Virus up to date, will save my bitcoins from 12 years old lame hackers. There is no need to be paranoid about wallet, if here isn't really BIG amount of BTC
molecular
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June 20, 2012, 08:38:13 AM
 #791

I got a 2gb micro sd card salvaged from my old smart phone. I knew it was going to come in handy!

just don't make it the only place to put your encrypted wallet.dat

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marika70
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June 21, 2012, 03:38:03 PM
 #792

that was very helpfull thank yo u
procyon
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June 21, 2012, 04:19:23 PM
 #793

...
2. Wallets stolen from RAM:
You CAN'T do this even if the computer is running nothing BUT bitcoin and malware:

Every program has a ram space, other programs can't touch it.

This means that even assuming data stayed alive in RAM a while (I never heard of such):

The virus would need to allocate almost ALL the computers RAM to itself in order to even get access the residue after the bitcoin client closed THEN it would have to search it.

This would slow the PC to a crawl and be VERY obvious.
...

This is NOT true. Programs can read and write to RAM not owned by them. Nice programs don't do it, but programs can do this. You need to know something about the data you are looking for, it won't be nicely labeled 'secret_key:', but it is not impossible to find and extract. I have done this (with other programs, not bitcoin) on both windows xp and 7.
Beleth
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June 23, 2012, 08:25:55 AM
 #794

Thanks for the great guide.
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June 24, 2012, 02:04:32 PM
 #795

Thanks, tried it out and it worked
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June 24, 2012, 10:49:30 PM
 #796

ARMORY looks like a good choice of software for secure wallet
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June 25, 2012, 06:08:40 PM
 #797

Thanks for this tut, I'm sure you've helped a countless number of people with it!
gamebak
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June 27, 2012, 02:55:22 AM
 #798

really a great tutorial, thanks mate.
muqali
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June 27, 2012, 04:54:22 AM
 #799

A linux distro that has everything you need probably can't come quick enough.

The distributor of that distro needs to enjoy enormous trust.

I trust a vanilla ubuntu live cd a ton lot more to contain no wallet stealer than a special "for your secure bitcoin savings" distro.



I am quite fond of TAILS but of course a Live CD can't store data like your wallet and private GPG key - it is possible though to use the built in disk utility to encrypt a USB stick which can contain such information.

V.

I'd like to second the use of tails as a live cd. It's backed by debian's massive repository if you absolutely need some program while setting up your secure wallet.

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rgenito
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June 27, 2012, 06:02:07 AM
 #800

i didn't bother to read EVERY thread on here, but a thing to beware of with linux USB / live CDs: if your encryption requires high-quality random numbers, you might not want to generate random keys after booting from a USB boot / live CD; apparently that's not a good choice because the environment is more predictable. Anyone out there ever even take advantage of this flaw? I sure haven't; I've only had wikipedia entertain me with these thoughts Smiley

Honestly, it surely doesn't matter, but for those that love being paranoid: beware of generating keys after freshly booting from a live CD / USB.

As for creating a "100% secure wallet", I don't think it's possible to quantify or measure the % of security that a wallet is under. Keep in mind that your wallet isn't exactly secure if even YOU lose access to it! (It's no longer secure--it is useless!)

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