I wonder why this is so hard... It's best to include it naturally in a post. But if you can't, you can send a PM to an account that won't delete it (you could use DefaultTrust for this). After you send it, check your outbox and make a note of the PM's ID (visible in the quote URL).
-snip-
Just send a PM to DefaultTrust now, write down the PM id and the address in a safe place and you are fine. |
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Hi Shorena. You stated that "your wallet is your bank and you don't need a debit card". "You can pay directly with your wallet". Well, I was trying to transfer the bitcoins to my bank, then withdraw it in the form of USD with my debit card that my bank gave me. Am I making sense? I hope I'm conveying this correctly. I don't understand what you meant by you can pay directly with your wallet?
So you want to sell bitcoin for USD? Open an account with any of the common exchanges*, transfer your BTC there ("deposit BTC") and withdraw to your bank account. They usually want a proof of residence and charge a fee. * bitstamp, btc-e, coinbase, kraken, vault of satoshi, etc. Bitcoin however is a currency so you can pay directly with bitcoin. You can transfer bitcoin to someone else with your wallet, thus paying for something. |
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sudo aptitude install bitcoind ?
I am not entirely sure what your question is, maybe you can ask more specific.
basically I have no idea what I am doing. I'll PM you now Im not going to help you scam other people, posting this reply public so people know what you are trying to do. |
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sudo aptitude install bitcoind ?
I am not entirely sure what your question is, maybe you can ask more specific.
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Hi,
Sorry I can't speak German but I thought this is the best place for the information I am seeking for.
This board might work as well: https://bitcointalk.org/index.php?board=133.0I am writing a piece about moving funds from Germany to Turkey. And I need information of the available exchanges to the citizens of germany.
Is there any Germany located exchanges?
Yes, https://www.bitcoin.de/But you transfer the money by bank anyway, so any other exchange that you like is fine. Just keep in mind that they usually want some sort of verification. E.g. Proof of address. Are there any difficulties or legal problems about transferring money from banks to exchanges?
The Postbank is known to make problems. Buying bitcoins is legal though. Its just that some banksters are idiots. What are the costs of buying/selling bitcoins? (the percentage that exchange cuts)
thanks
https://www.bitcoin.de/de/infos#gebuehren |
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Can anyone tell me if another online wallet work just as well as the 2-factor authenticator or is offline storage better?
If you just have some satoshi from faucets offline wallets is a security overkill. Pick your wallet, here are the important ones listed: https://bitcoin.org/en/choose-your-walletaccording to your needs. To start a slim wallet for your desktop (e.g. electrum or multibit) is fine and you can worry about high end security (offline, cold storrage, paper wallets, etc.) when you have more bitcoin. And what's the best debit card to withdraw funds from your bank?
I dont understand what this has to do with bitcoin. Your wallet is your bank. You dont need a debit card you can pay directly with your wallet. |
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-snip-
Put the addy in your sig and admins can see when it was updated to new addresses
If you read the answer given by people before you ... -snip-
I can't conveniently check signature edits.
-snip-
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Could HW errors stem from a pool as well?
No, the pool is just giving your machine something to work on and gets the result. While the pool has hardware, the pool itself does not do the calculation. Even if the pool would do some calculations your machine should not be able to detect if any other machine makes calculation mistakes. That would be like me checking whether your CPU is fine just because I download data from you via bittorrent (or something else) can error be mining software Yes the software can be flawed, but most mining software out there is heavily used by many people. Those errors are most likely fixed in all current versions of miner software. Theoretically the software could be corrupted, but thats not likely. Its more likely that the software wouldnt run at all if it was corrupted. |
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-snip-
I thought there was an issue of probability involved with the reversing of transactions.
Thats true because there is probability involved when finding a block. Or is it something like when the attacker who has >50% chooses to publish their blockchain that doesn't have the transaction that's supposed to be double spent the network automatically accepts their chain because they've done the most proof of work?
"The rule" is: the longest blockchain is the valid one. The attackers can work on an an alternative blockchain in secrecy and release it to the public when its long enough. Does that sound right at all? So it doesn't matter how many confirmations happen because they will all be wiped out when the network accepts this new chain?
That is correct. The new, now longer chain of blocks, will most likely have no or very few transactions at all* thus all transactions that have been included in other blocks are now invalid. Well not exactly invalid, they never happened. *this depends on the prefernce of the attckers, they can basically put any valid transaction in those blocks they want |
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More blocks = harder to replace them.
That will not help against a 51% attack (or >50% attack) because the idea behind that attack is that the attackers control the majority of the hashing power. They could create replacement blocks without publishing them and wait 8, 10, 12 or even more confirmations before broadcasting them.
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-snip-
Mein Service ist fuer all jene die Bitcoins anonym kaufen wollen
Wie stellst Du die Anonymität sicher wenn ich nicht bar zahle? |
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-snip-
It sounds like secure. I don't think you will loose your private key if your wallet is locked.
Thats true, but if you generate a private key it is not encrypted yet. The offline setup is usually for people that can not trust their own everyday system (trojan, keylogger, nsa, just beeing paranoid, etc.). But If I cant trust system B I should not generate the key there. That negates the whole point of the setup. You want an offline PC you can trust where you make the new key. After you encrypted that key you can move it around. The extra paranoid even dump the OS that made the key afterwards. For large amounts of BTC Id use several 2 of 3 split paper wallets. Load each with up to 10 BTC and put them in different secure places (safe, deposit box, burry underground, etc.) I actually like the idea of putting them underground in many different places so when I die there will be big treasure hunt with riddles to solve and all the good three investigators stuff  |
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Don't forget that electrum still needs an internet connection to connect to the blockchain. Every wallet needs to, sooner or later. Although you may have the electrum installation file on your USB, it needs to grab a legit copy of the blockchain to sync your transactions and all the essentials . I think you also might have misunderstood the concept of a "cold wallet". When you make a cold wallet, you still have to be synced to the blockchain. However, once the cold wallet is made, it is literally "cold" without any need for a connection to the blockchain until it is used for a withdrawal. I hoped my answer helped. My apologies if it doesn't quite make sense. What? https://electrum.org/tutorials.html#offline-mpkOf course you can make a wallet offline. Creating a wallet has nothing to do with the blockchain. You dont even need the blockchain to make a transaction. Chances are its not going to be valid if you dont know how much you can spend, but you can still create it. Hello!
I've read a lot of tutorials but I must have missed something because I cant find a way to install electrum on a computer without an internet connection. I have electrum on a usb file along with linux mint. I boot on linux mint but then what shall I do?
Why do people use the internet connection to install electrum on the livecd ? doesnt that defeat the purpose of the coldwallet?
please hlep
Did you download the standalone version*? I just tried it at and it worked fine*. I even go the "you are offline" warning. Not sure if thats the message you get and just interpret it differently. *Edit: just realized that you are on a linux machine. The problem is that you need to install electrum first and that must currently happen online. see also here: https://bitcointalk.org/index.php?topic=416881.0The security part is that you take that version of Linux (in the guide its ubuntu, but mint is similar) to an offline PC, create your key there, so the key has never been online. |
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I'm planning on buying a relatively large amount of bitcoins soon, and want to make sure that my plan for safekeeping them is as secure as I think it is. I do not yet have a laptop that I'll use for an offline computer, but plan on using this particular purchase strictly for the purposes of a long term investment, so I don't plan on spending the coins any time soon.
Here's my setup. I'm using Windows 7 64 bit, and I have Armory installed. The wallet I plan on using is offline. After creating the wallet, I transferred the private key to a flash drive so that money cannot be spent from this wallet without me explicitly moving the private key back on to my primary computer, or more likely, buying an offline laptop and moving the private key over there. I will be making a paper backup of this wallet to ensure that I'll have access to my bitcoins in the event that my flash drive crashes and I lose the private key.
Is this setup secure? I want to ensure that I'm secure from both losing the bitcoins to hard drive crashes and keyloggers / trojans.
Update: Oh, I should add that while I haven't yet done this, I plan on encrypting my Armory private keys on my flash drive just as an extra layer of security, on the off chance that there are any trojans out there that look for bitcoin private keys in flash drives. Long term, I'll definitely be investing in a laptop that I'll use as an offline bitcoin storage device, but until I get that point, I think this ought to be fairly secure.
Im not 100% sure I understand what you want to say, but it sounds like: buy computer A generate new key on old computer B copy key from B to A somehow make sure that key is no longer on B assume key is now safe on A because A was never online, while totally forgetting that the key comes from B, which is constantly online Its irrelevant if you encrypt the keys on the USB drive. If B is infected your setup is not safe. If B is safe, why bother buying A in the first place? If you want to make sure you have a secure private key on a dedicated machine, generate the key on that machine. |
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-snip-
I don't think there is currently a use for synchronous or in-order messages. You could be the first to come up with one.
Maybe stream a video with your transaction? I dont know the toolkit but the names... the dev's must have a good sense of humor. -snip-
RELIABLE_MESS:
-snip-
CAUSAL_MESS:
-snip-
AGREED_MESS:
-snip-
SAFE_MESS:
wouldnt want to mess those up  |
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Those only affect systems that are affected by heartbleed. So if openssl has been upgraded from the
affected version there is no issues.
Oh, good to know. Then there's a bit of FUD in many articles about this news. Its FUD that this only affects systems that are affected by the heartbleed bug. One of the new bugs is in code that the same person wrote who did the misstakes in heartbleed, maybe thats where this missunderstanding comes from. From what I read noone uses DTLS anyway. Anonymous ECDH is not used by the forum and barely any homepage for that matter because most use certificates anyway. The only thing that could affect us would be the possible MITM for Bitcoin, but than not really doing any damage AFAIK. You can MITM with Bitcoin anyway, but not get the juicy stuff (private keys). |
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If my account ever gets hacked, I want people to know what my Bitcoin Address is so that I can sign messages and verify my identity. Is there any place in the forums to do that? I can't just post it randomly around here, because the hacker could simply edit the post with his own address or delete the post. It should be something like the Auctions sub-forum where you can't edit or delete posts, except this would obviously not belong there.
- Make a 2nd account - send a PM with a BTC address you control to that 2nd account. - delete msg on your main account (msg will still ne on 2nd account) - verify that the PM is on that 2nd account - only use 2nd account if your main account gets hacked. |
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-snip-
There is three BTC addresses in Multibit, as you know we can't back up a specific key from it, so will any problem occur if I copy the whole private keys when importing?
-snip-
If you export via multibit you will get a file multibit.key. You can open that with any texteditor if its not encrypted. It will look like this: # KEEP YOUR PRIVATE KEYS SAFE !
# Anyone who can read this file can spend your bitcoin.
#
# Format:
# <Base58 encoded private key>[<whitespace>[<key createdAt>]]
#
# The Base58 encoded private keys are the same format as
# produced by the Satoshi client/ sipa dumpprivkey utility.
#
# Key createdAt is in UTC format as specified by ISO 8601
# e.g: 2011-12-31T16:42:00Z . The century, 'T' and 'Z' are mandatory
#
L5gveWnEvSkCtTN-snip-DjWM2TEq9RDNUTMd6PCTieAKFeC 2014-06-06T13:01:13Z
L1b67i486f5v-snip-ZB6E1maqurp7k8VxA7rvE 2014-06-06T13:01:13Z
L1TqqP7BjTZRS3-snip-yAYPcwXRUcT7qmzbqpAGWN 2014-06-06T13:01:13Z
L4b7YkkR9mH-snip-SYgWCy6GSUZHbnCBFuF9tvAhTMeCq 2014-06-06T13:01:13Z
Kwrne6dji7ku-snip-PDDw3dP3UUDrnwPLbCHgzMsx 2014-06-06T13:01:13Z
KyMwnzMxz5-snip-E3AsFgy4cqxfMjdijACzSPRjb 2014-06-06T13:01:13Z
# End of private keys
This is a testwallet I just made. As you can see it gives you a list of the private keys. You can now take each of these keys and import them one by one into bitcoin core. Aaand I have to make sure not to use these keys ever |
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