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201  Bitcoin / Armory / Re: Anyone use raspberry pi with armory? NT on: February 26, 2013, 06:24:32 PM
i was wondering: doesn't armory need a version of bitcoin-qt running with an uploaded blockchain in the background ?
And if i need to connect my pc to the internet to update the blockchain doesn't that pose a security threat since i want to keep my offline pc offline ?

Greetz.

You would be running 2 separate machines. One online and one offline.
Only your online computer needs the blockchain. All the offline computer does is generate the addresses and create a "Watching only" copy for your online computer. The offline computer won't even tell you your wallet balance. Because it never has and never will touch the internet (or the blockchain).

See the QSG link above. It explains the differences between the 2 in detail.
202  Bitcoin / Armory / Re: 2-of-3 Paper Wallets on: February 26, 2013, 02:27:18 PM

By the way, the algorithm that I have implemented uses deterministic fragment generation.  i.e.  You require any 3 pieces to reconstruct the wallet.  You print out 5 such pieces.  Now lets say you decide too much risk is involved in losing a couple of the pieces, so you can print out fragments #6 and #7 and know that they will compliment the other pieces.  Or if one of your fragments is destroyed, you can reprint #2 and know it will be the same as before.


That's awesome and offers tons of flexibility. I can't wait to play around with this feature.


As for peace of mind that the fragments will reconstruct properly... I'm not sure how to do that "right".  I can show the user the result of recombining fragments (as I did in my first post in this thread, showing that I did the calculations and got the same answer, but that's not necessarily comforting to the user.  They won't be satisfied until they manually enter each fragment into a fresh version of Armory that's never seen the wallet, and they get the correct answer.  There's nothign I can really do about that.


Exactly, the only thing you can do is preach about practice!  I didn't put any large amount in cold storage until I had reconstructed my wallet 3-4 times, I even did a fresh OS install and reconstructed again.
203  Bitcoin / Armory / Re: Anyone use raspberry pi with armory? NT on: February 26, 2013, 02:14:32 PM
I came across the post below the other day.
The system requirements are not very demanding.

See the QSG HERE for requirements.

Don't forget about printer drivers if you plan to print a paper backup instead of writing it down.

Question about offline transactions... what are the system requirements for a computer that would ONLY hold private keys and sign transactions?

Nothing special. I run it on a Raspberry Pi.

And is there any special setup procedures for such an offline computer?  Do I still have to install the Bitcoin-QT client?

Nope, no blockchain or network connection is necessary.
204  Bitcoin / Armory / Re: Ubuntu LiveCD (offline wallet) + Win7 (online wallet) = no problem? on: February 26, 2013, 02:01:17 PM

Thanks, actually installing "Armory offline" went well, but my printer is a Canon mp990 and when I tried to print a paper backup plus the private keys I discovered that Canon don't really support Linux drivers. Tried Turboprint, but when trying to install that I bumped into a "missing dependencies" error...ironic huh.  Roll Eyes
So after all tha hassle (getting the LiveUSB to work was also a real hassle) I couldn't be bothered anymore, So now I guess I'll just buy a cheap, refurbished laptop with win7...

Yeah, that reminds me of what I ended up going through trying to print a paper backup. Using the older OS (Ubuntu 10.04) without a network connection.
Ubuntu had some print drivers pre-installed, but not any drivers for newer printers (like the ones we have here at the office).
I was able to find printer drivers for Linux, but those drivers had dependencies, and those dependencies had dependencies, and those . . . .
I thought about getting an old ass printer off of Ebay for $30 and hope it had enough ink to print 2 pages.
But I got lucky when I found a printer at home that was old enough to get the job done.  Grin

205  Economy / Marketplace / Re: [Announcement] Buy Amazon Giftcards with Bitcoins! AmazonBitcoins.com on: February 25, 2013, 09:00:10 PM
This is great news. I buy tons of stuff from Amazon. Congrats on the good review.
206  Bitcoin / Armory / Re: Ubuntu LiveCD (offline wallet) + Win7 (online wallet) = no problem? on: February 25, 2013, 04:17:09 PM
Great, thanks for the quick reply!
Wish me luck, I'm not really familiar with Linux, so my guess is just installing Armory on the LiveCD will be quite the challenge.  Cheesy

The process shouldn't be too bad. You just need the correct dependency's for Armory. There is an Armory package that includes these for a Ubuntu 10.04 install on the Armory site under "Get Armory"
This is what I used for my offline machine. Not a LiveCD system but it's Linux none the less.

Not sure if you'll need it, but I'm working on a Tutorial for my friends and family.
Note that most of them are not as computer literate as the rest of us, so don't be offended if it's spelled out too clearly for your taste.
207  Bitcoin / Armory / Re: 2-of-3 Paper Wallets on: February 25, 2013, 03:09:02 PM

I like the idea of putting one in your will (that's essentially giving it to an attorney, though, isn't it?).   You could also have fun nesting these, if you weren't afraid of mind-blowing complexity -- split the secret into M-of-N, and then fragment some of the pieces further.  It would allow you to create asymmetrically-important fragments, so that each piece really just represents some fraction of the secret, some pieces worth more than others.


This M-of-N system is a great feature and it will help many people, including myself sleep better at night. But . . . .
Since the subject of super paranoid people has already come up here, If I were that paranoid person, I would prefer a backup system like X+ M-of-N. Where X is the piece that is in my will.
I want to die before any of the pieces can be used. Is that something that could be possible with the current system that you're working on?

As I typed that out, I answered my own question. I think it is possible, if you split it into enough pieces and keep > 51% of the pieces required to recover your wallet for the will.

Example: Require 7-of-10 and put 4 pieces in your will.

208  Bitcoin / Mining speculation / Re: A Guide to Mining in 2013. on: February 21, 2013, 03:20:54 PM
Mining with a GPU is great if you're just starting out, but we have now passed the point where buying a rig just to mine is going to be a waste of money.

Mining with GPU's is still profitable right now if you have already paid for them. So keep them running if you have.


(Note: No ASIC units are shipping yet. Buyer beware of fraudulent ASIC order takers. For maximum safety do not pre order any ASIC product.)


If you haven't ordered yet, you'll get your ASIC when the network hash rate is higher than the people that ordered early. This reduces your profit potential.
(Note: Being "safe" has a huge disadvantage.)
209  Bitcoin / Armory / Re: Armory (Offline) and Ninja Boot? on: February 11, 2013, 07:25:22 PM
I was browsing the Wiki (https://en.bitcoin.it/wiki/Trade) on the various places where one can spend their Bitcoin and stumbled upon a bootable USB stick called Ninja Boot (www.ninjaboot.com). This $20 gadget comes pre-loaded to boot your computer into a TAILS OS and only use the Tor network. I'm thinking that this might work for an offline computer similar to a Live CD, provided that you don't give it access to the internet by unplugging your Ethernet and/or disabling your WiFi?

Obviously, one would need to install Armory each time, but if it could work, it may be an alternative for those that do not have the old laptop lying around or the $200-300 to get the offline computer required for cold storage.

I would guess this all hinges around weather or not the offline Armory bundle will install on this OS.

Thoughts?

Did I mention that it looks cool too?

It isn't very hard at all to put your own pgp-verified download of Tails (or any linux distro) onto a USB stick and spend less than $20.
Consider the average Joe that may not be as geeky as some of us (myself somewhat admittedly included). Joe works at CompanyXYZ where they pay him $25/hr. If Joe were to sit in front of his computer and learn about a bootable USB, PGP-verified, SomeOtherMumboJumbo that he does not know a thing about yet but he just wants to keep his Bitcoin safe, he could possibly take 2 hours to 20 hours to learn how to do it. Now if there was a ready made alternative that he could order for about an hours worth of his paycheck, why wouldn't he choose the alternative? Hardware wallets are being developed for some of these same people and same reasons. How much are those going to cost?


When trying to be security conscious/paranoid, it doesn't make any sense to me for someone to not do it themselves.  If I were nefarious, I would build a custom Tails distro with a backdoor hidden service and a keylogger and sell it to noobs who don't know how to format a USB stick.
The future of Bitcoin will include many thousands of noobs, and they may not want to learn all of the techie stuff to keep their Bitcoin safe. Should they not have an easy alternative?
If the machine NEVER has an internet connection, is this a possible threat to said Bitcoin?


I'm not saying Tails won't work, but I don't see much point in using it for an offline system.  The whole point of Tails is Tor.  I guess it is an easy way to get an encrypted partition.  Side note: read this about TrueCrypt
The point was to have a computer that is isolated from the internet "unplugging your Ethernet and/or disabling your WiFi" without having to use an additional computer.


Also, Tails has had a persistence partition since 0.11, so you wouldn't need to install armory every time.  For an online system, Tails should work well and you should be able to install armory on it no problem.

This is good news, and saves a few steps. Thanks for the tutelage.


210  Bitcoin / Armory / Armory (Offline) and Ninja Boot? on: February 11, 2013, 04:18:07 PM
I was browsing the Wiki (https://en.bitcoin.it/wiki/Trade) on the various places where one can spend their Bitcoin and stumbled upon a bootable USB stick called Ninja Boot (www.ninjaboot.com). This $20 gadget comes pre-loaded to boot your computer into a TAILS OS and only use the Tor network. I'm thinking that this might work for an offline computer similar to a Live CD, provided that you don't give it access to the internet by unplugging your Ethernet and/or disabling your WiFi?

Obviously, one would need to install Armory each time, but if it could work, it may be an alternative for those that do not have the old laptop lying around or the $200-300 to get the offline computer required for cold storage.

I would guess this all hinges around weather or not the offline Armory bundle will install on this OS.

Thoughts?

Did I mention that it looks cool too?
211  Bitcoin / Bitcoin Technical Support / Re: Looking for simple wallet/client restore instructions for all types of wallets. on: January 10, 2013, 10:01:42 PM
Thanks Jim, this is exactly the kind of stuff that I am looking for.
I will download and play around with MultiBit tomorrow.
212  Bitcoin / Bitcoin Technical Support / Looking for simple wallet/client restore instructions for all types of wallets. on: January 10, 2013, 09:27:57 PM
I'm new to Bitcoin and I'm trying to get started with the best possible habits. I've been reading up on all the noob stuff that I can find. I have compiled a list of some of the "best practices"
All of the threads that I have read about wallets say that you need to back them up on a regular basis. Some of them are also very specific about how to do this, but not how to recover.

I am having a lot of trouble locating simple instructions on how to restore a wallet from a backup (for noobs).
I know that each client/wallet will have it's own set of instructions, but I'm not deeply invested in any particular wallet yet.
I'm hoping that you, the Bitcoin community can reach out and help me locate the recovery instructions for restoring from any and all types of backups.

So I've spent a few bucks on some coins so that I can practice moving my coins and backing them up and restoring wallets from a backup.
Once I am comfortable that I can create a backup and actually restore it, I will then buy myself a larger amount of Bitcoins.

It would also be appreciated to hear about the wallet of your preference based on the above.
213  Economy / Micro Earnings / Re: Free Bitcoin Sites *and* Free Newbie Lotto on: January 10, 2013, 06:20:58 PM
Please add me to the list. Thanks.
12ECuzRTBybDg57FCXMwMFG4a8GusYjr1y
214  Other / Beginners & Help / Re: Other Deterministic Wallet Concerns on: January 09, 2013, 07:45:11 PM
ThomasV thanks for trying to keep it simple.

I've been doing a lot of research over the past few days regarding Bitcoin.
I am a huge believer that Bitcoin has the potential to change the world. Yes, I'm serious and if you don't believe me just look around the world and understand that a lot of those problems are caused by fiat currency. This could be the mother of all Black Swans. Why do I feel like I preaching to the converted all of a sudden?

My point is that to attract guys like me into the market requires simplicity and safety. I'm more than willing to take it slow if it means not losing a bunch of btc because of my failure to backup a wallet.dat file.

In my mind, the whole raison d'etre of the seed, the entire beauty of deterministic wallets, is their simplicity. And let me tell you, simplicity goes a long way when it comes to something as new as Bitcoin and as important as purchasing power.

Computer morons like myself rely on the programming experts to keep it simple until we are more comfortable moving to wallets with more bells and whistles.

Steve Jobs built the world's top company based on that philosophy.


[end plea/rant]

Yes bitcoin is going to most definitely change the world and more and more people are catching on to it


I agree, Bitcoin is going to change the way people use their money. That's why I'm just getting into this as well. Kicking myself for not starting earlier but who isn't.
I was reading a few other threads about wallets and security, found the "Deterministic" wallet piqued my interest, and I'm on board with it now.
I too, feel that I (among other people) need the simplicity.
That all said, what am I missing? What are the drawbacks (other than losing the the original backup or getting the whole wallet hacked if I'm not careful)?
215  Other / Beginners & Help / Re: Membergroups; or: Why do some users get colored coins under their names? on: January 08, 2013, 05:12:00 PM
This is a great system for ranking users and moderators.
I hope to be big and rich enough someday to become a VIP.
216  Other / Beginners & Help / Re: Terminology on: January 08, 2013, 05:02:42 PM
This really helps, thank you
217  Other / Beginners & Help / Re: Introduce yourself :) on: January 08, 2013, 04:16:08 PM
Call me whatever you like, but this is my third post, I'm getting closer. I even feel taller too.
218  Other / Beginners & Help / Re: Trust No One on: January 08, 2013, 04:11:44 PM
I agree about not trusting anyone at the bank, but you shouldn't even trust your computer even if your have the "best" antispyware available.
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