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1  Economy / Service Discussion / Re: Any online wallets that you can use through Tor without Javascript? on: November 13, 2013, 11:46:07 AM
TradeFortress? Is that you?

No.

I'd like to use Tor with Javascript disabled for all my bitcoin transactions, but I can't find any online wallet out there that will both allow the import of private keys and work without Javascript? Anyone know of one? It can be a wallet, exchange, tumbler, anything really that would allow me to send BTC from an imported paper wallet.

Give up on this online wallet thing. The death of Inputs.io should have killed this being a desirable thing.

What you can do though is fire up a local client and route your computer's connection to the internet through tor when you want to fire up your Bitcoin client. As bad as online wallets have been on the clear web, tor wallets have an even worse history.

It doesn't have to be a tor wallet necessarily. It can be a clearnet wallet that will work with tor and without javascript.

The only web wallet vaguely worth trusting anymore is blockchain.info, and only because it uses javascript to ideally allow you sole access to your private keys hough it is still potentially vulnerable to malicious javascript.

Here's a bit of a primer on why you don't want a random third party having your private keys, one on what constitutes a wallet, what happened to the last web wallet that tried the secure shared wallet model, and finally some extra credit reading because reading is informative.

Any time you don't have sole access to your private keys you don't have Bitcoin. How closely what you have to Bitcoin depends on the reliability of the counterparty to which you have made a deposit. Web wallets have been unreliable. Tor web wallets have been especially unreliable.

Honestly I don't really know that using tor to send a bitcoin transaction provides especially more privacy. Saying a BTC transaction was sent by IP address X is a daunting task to prove. More so than which pool relayed a new block first and even that is a challenging problem.

I don't plan on trusting anyone. What I intend to do is generate a bunch of offline wallets by (for instance) downloading the html of bitaddress.org and using it at an offline computer. I'll transfer BTC to them and keep them offline until I need them. When I do need them I want to import the private key to an online wallet and immediately send out all the BTC in to a cashout account. The odds of that site being hacked or disappearing in the 2-3 minutes it will take me to do this are fairly low.

As far as using Tor, I want to err on the side of caution. Losing the BTC in any given wallet is less important to me than compromising my anonymity. That's why I'm paranoid about not using Javascript, given what happened with Tormail. I'm don't know much about Tor other than the basics though. Do you know of a way to route an local wallet client through Tor that would provide security comparable to using Vidalia with Javascript disabled?

And getting back to my original question, does ANYONE know of an online wallet that will work without Javascript, or does one not exist?
2  Economy / Service Discussion / Any online wallets that you can use through Tor without Javascript? on: November 12, 2013, 01:48:45 PM
I'd like to use Tor with Javascript disabled for all my bitcoin transactions, but I can't find any online wallet out there that will both allow the import of private keys and work without Javascript? Anyone know of one? It can be a wallet, exchange, tumbler, anything really that would allow me to send BTC from an imported paper wallet.
3  Bitcoin / Bitcoin Discussion / Re: Anonymous and Secure Bitcoin Wallet on: November 12, 2013, 10:10:48 AM
You have to trust the code from bitaddress.org.

When you import the private key into Multibit, it could take a while. I'm not that familiar with light clients, but it may require downloading and parsing the full chain.

Could someone please confirm whether or not downloading the full chain would be required to import a private key into Multibit?

Don't forget the change. Let me give an example. Say you backup the private key for address A, you transfer 100 BTC to address A, you import the private key, you spend 10 BTC which causes the 90 BTC change to be sent to a new address B, and then delete the client on the USB stick. If you were using bitcoin-qt, you would have lost the 90 BTC. Again, I don't know what Multibit does.

Could you (or someone else) elaborate on this please? From my understanding what happens when I spend 10 out 100 BTC from wallet A, the remaining 90 BTC don't stay in wallet A. The client automatically creates wallet B and sends the 90 BTC there; as a result if the client is deleted withough wallet B being backed up, the funds are lost, right?

It seems that to counteract that, all I would need to do is create paper wallet C, and transfer the 90 BTC there before deleting the client. This way I don't need to bother with any backup, and the 90 BTC remain safe and offline until I need them. Do I understand this correctly?
4  Other / Beginners & Help / Re: Anonymous and Secure Bitcoin Wallet on: November 12, 2013, 10:06:23 AM
The only other potential issue I could see is that you should make sure to use a new MultiBit wallet file for each private key you import as multibit has a very non-anonymous way of handling change, MultiBit seems to re-use change addresses.

Could you please elaborate on that? What do you mean by re-use change addresses?
5  Bitcoin / Bitcoin Discussion / Anonymous and Secure Bitcoin Wallet on: November 10, 2013, 06:56:47 PM
Hi. I’m pretty new to bitcoins and I need some advice. My goal is to create a completely anonymous, reasonably secure bitcoin wallet. My plan is this:

1. Download the html page for bitaddress.org through Tor and transfer it to an encrypted offline computer using a USB stick.
2. Generate paper wallets using that page at the offline computer.
3. Send bitcoins through bitcoinfog to the public addresses of those wallets.
4. When I decide to spend the bitcoins, download Multibit through Tor and configure it to run through Tor. Then transfer the private key of whatever wallet I want to use from the offline computer using a USB stick and import it into Multibit.

To the best of my understanding this will allow me to have a completely anonymous and secure storage of bitcoins, without having to download Armory and the whole chain. So long as no one has physical access to my offline computer, the only bitcoins that I could possibly lose are those in whatever wallet I import into Multibit in the brief window before I send them out.
Does anyone see any problems with this plan or why it might not work?

Two specific questions that I have are:
1. If I generate a bitcoin paper wallet at an offline computer, I don’t need to take it online in any way until I want to withdraw the bitcoins, right? I can just send the bitcoins to the public address and they will be waiting there for me until I import the private key into a bitcoin client?
2. I read that configuring Multibit to work anonymously through Tor is as easy as pointing it to the Tor proxy. Is that true? Any security issues involved?
6  Other / Beginners & Help / Re: Anonymous and Secure Bitcoin Wallet on: November 10, 2013, 06:55:52 PM
Thank you for your response! I'm going to repost this topic in general discussion to try and get more input.
7  Other / Beginners & Help / Anonymous and Secure Bitcoin Wallet on: November 09, 2013, 01:12:24 PM
Hi. I’m pretty new to bitcoins and I need some advice. My goal is to create a completely anonymous, reasonably secure bitcoin wallet. My plan is this:

1. Download the html page for bitaddress.org through Tor and transfer it to an encrypted offline computer using a USB stick.
2. Generate paper wallets using that page at the offline computer.
3. Send bitcoins through bitcoinfog to the public addresses of those wallets.
4. When I decide to spend the bitcoins, download Multibit through Tor and configure it to run through Tor. Then transfer the private key of whatever wallet I want to use from the offline computer using a USB stick and import it into Multibit.

To the best of my understanding this will allow me to have a completely anonymous and secure storage of bitcoins, without having to download Armory and the whole chain. So long as no one has physical access to my offline computer, the only bitcoins that I could possibly lose are those in whatever wallet I import into Multibit in the brief window before I send them out.
Does anyone see any problems with this plan or why it might not work?

Two specific questions that I have are:
1. If I generate a bitcoin paper wallet at an offline computer, I don’t need to take it online in any way until I want to withdraw the bitcoins, right? I can just send the bitcoins to the public address and they will be waiting there for me until I import the private key into a bitcoin client?
2. I read that configuring Multibit to work anonymously through Tor is as easy as pointing it to the Tor proxy. Is that true? Any security issues involved?
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