★☆ Get Help Here | The Ultimate Help Thread! | Free Giveaways ★☆ - page 9.

devthedev

legendary

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Quote from: Parham6 on June 10, 2014, 01:44:58 AM

Well I still haven't got the answer to my question: I'm using multibit and I want the Public Key (It's different than address) of my address, how do I get it? I don't want to know how a public key is calculated, I don't wanna read a dozen pages of math, I just want to know how to get it, period.

Unfortunately, I don't think there is an easy way to find a public key from MultiBit right now.

Thanks Kuverty.

kuverty

sr. member

Activity: 770

Merit: 250

Quote from: Parham6 on June 10, 2014, 01:44:58 AM

Well I still haven't got the answer to my question: I'm using multibit and I want the Public Key (It's different than address) of my address, how do I get it? I don't want to know how a public key is calculated, I don't wanna read a dozen pages of math, I just want to know how to get it, period.

It is not that simple, I don't think you can see it from the wallet as it is. I do not use Multibit, though. One thing to note right away is that your address is generated using a cryptographic digest (hash) of your public key, so there is no way you can go back. It is not possible to compute the public key using your public bitcoin adress.

You will need to use your private key to calculate that, there are some tools for this luckily and the easiest method I can think of is going to https://www.bitaddress.org and choosing "Wallet details". There you can input your private key in pretty much any format it happens to be in and it will calculate for you the public key, either in the 65-byte uncompressed format or the 33-byte compressed format, whichever you need. As far as I remember, the page also works offline so you can do that for security and you should, too.

To see yout private key, export your private key to a file in Multibit and open the file in your favourite text editor.
Can I ask, what do you plan using your public key for?

Coef

hero member

Activity: 882

Merit: 1000

Exhausted

Quote from: Parham6 on June 10, 2014, 01:44:58 AM

Well I still haven't got the answer to my question: I'm using multibit and I want the Public Key (It's different than address) of my address, how do I get it? I don't want to know how a public key is calculated, I don't wanna read a dozen pages of math, I just want to know how to get it, period.

First get the private key and then do the conversion to public key with openssl.
http://stackoverflow.com/questions/20086121/convert-ecdsa-private-hex-key-to-public-key

Parham6

member

Activity: 70

Merit: 10

Deceased

Well I still haven't got the answer to my question: I'm using multibit and I want the Public Key (It's different than address) of my address, how do I get it? I don't want to know how a public key is calculated, I don't wanna read a dozen pages of math, I just want to know how to get it, period.

devthedev

legendary

Activity: 1050

Merit: 1004

Quote from: kuverty on June 09, 2014, 09:44:55 PM

This is a nice thread, will be helping others when I have the time. Winning one of those cool things would be even better than buying one.

Thanks! Good luck Cheesy

kuverty

sr. member

Activity: 770

Merit: 250

This is a nice thread, will be helping others when I have the time. Winning one of those cool things would be even better than buying one.

devthedev

legendary

Activity: 1050

Merit: 1004

Bump, bump. I know you have questions (:

Acidyo

hero member

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Will Bitcoin Rise Again to $60,000?

This thread is turning out to be pretty awesome!

Nice idea!

monbux

legendary

Activity: 1736

Merit: 1024

I have contacted devthedev and I am willing to also provide a small prize (for the time being) of a 1GH/S voucher on cex.io.
Worth ~ 0.00729 BTC, or almost $5 worth! Yay! May contribute more prizes in the future, not sure... I'll try and help as much as I can in this thread... thanks devthedev

devthedev

legendary

Activity: 1050

Merit: 1004

Quote from: monbux on June 09, 2014, 08:09:57 PM

Quote from: JohnFromWIT on June 09, 2014, 07:46:26 PM

Difficult one..
What is a woodwallet?

A very cool wallet Roll Eyes

Check out the official thread, https://bitcointalksearch.org/topic/wts-bip38-cold-storage-wooden-cards-to-protect-your-bitcoin-10-off-638832. I already have one myself, and it makes a great gift. DevTheDev is being very generous giving these away, they start at $19 USD plus shipping. Great thread, man!

Thanks monbux! There's nothing better than answering questions about Crypto and teaching people safe storage techniques with these WoodWallet giveaways (:

Are you new to the Bitcoin community? Let us know what kind of questions you have and we'll do our best to answer each and every one of them!

monbux

legendary

Activity: 1736

Merit: 1024

Quote from: JohnFromWIT on June 09, 2014, 07:46:26 PM

Difficult one..
What is a woodwallet?

A very cool wallet Roll Eyes

Check out the official thread, https://bitcointalksearch.org/topic/wts-bip38-cold-storage-wooden-cards-to-protect-your-bitcoin-10-off-638832. I already have one myself, and it makes a great gift. DevTheDev is being very generous giving these away, they start at $19 USD plus shipping. Great thread, man!

devthedev

legendary

Activity: 1050

Merit: 1004

Quote from: JohnFromWIT on June 09, 2014, 07:46:26 PM

Difficult one..
What is a woodwallet?

It's like a paper wallet, just engraved in wood.

JohnFromWIT

member

Activity: 112

Merit: 10

Difficult one..
What is a woodwallet?

devthedev

legendary

Activity: 1050

Merit: 1004

For every 50 questions asked I'll be giving away a free Woodwallet to a random user who's asked a question or helped others in the thread!

devthedev

legendary

Activity: 1050

Merit: 1004

Quote from: Cancan on June 09, 2014, 05:47:46 PM

What is the difference between nodes and miners?

Well to start off, a node refers to a "full" client. A "full" client is a client that shares transactions and blocks across the network. Each node has a complete copy of the ledger, which is a record of every Bitcoin transaction that ever took place. Such as Bitcoin-qt or bitcoind (headless).

When you're talking about miners I'm assuming you're talking about mining software. If so, "miners" don't need the full blockchain to operate. When you're using mining software such as Cudaminer and cgminer you're getting work from a pool that's running a Bitcoin client. The pool is essentially sending you a partial header for a new block and the software tries a lot of random numbers (nonces) in order to find one that creates an extremely low block header hash with a lot of zeros. Summing that up, a "miner" is not a node at all, it's just software that's doing basic calculations for a pool.

Let me know if that answers your question (:

Cancan

newbie

Activity: 27

Merit: 0

Quote from: devthedev on June 09, 2014, 05:31:39 PM

While I wouldn't use Washington Post as a reliable news source for Bitcoin, most of those answers were pretty spot on.

I know right? Times are changing, and we're starting to see major news websites actually doing their homework on Bitcoin.
But, so I won't be completely off-topic, I'll also add a question that a lot of newbies might have, as I noticed some tend to confuse the two:

What is the difference between nodes and miners?

devthedev

legendary

Activity: 1050

Merit: 1004

Quote from: Cancan on June 09, 2014, 04:37:40 PM

Great idea for a thread. While I don't have any questions, I would just like to leave this link here, as it's a list of interesting questions a newbie might have: http://www.washingtonpost.com/blogs/the-switch/wp/2013/11/19/12-questions-you-were-too-embarrassed-to-ask-about-bitcoin/

Thanks!

DannyHamilton

legendary

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Merit: 4615

Quote from: Bernard Lerring on June 09, 2014, 02:47:24 PM

When the difficulty changes how is it set?

There can't be some kind of signal dispersed around the network, saying "difficulty change ... ...NOW!", can there?

Yes, there is.

When a block is solved, that block is relayed throughout the network. The difficulty is recalculated every 2016 blocks. So each node knows it needs to recalculate the difficulty it's using before it starts working on its next block whenever its blockchain increases in length by another 2016 blocks. Each node calculates the difficulty for itself, and they all use the same rules for that calculation so that they end up with the same difficulty.

Cancan

newbie

Activity: 27

Merit: 0

Great idea for a thread. While I don't have any questions, I would just like to leave this link here, as it's a list of interesting questions a newbie might have: http://www.washingtonpost.com/blogs/the-switch/wp/2013/11/19/12-questions-you-were-too-embarrassed-to-ask-about-bitcoin/

devthedev

legendary

Activity: 1050

Merit: 1004

Yep, this is a good explanation

Quote from: Acidyo on June 09, 2014, 03:19:57 PM

It retargets every 2 weeks or so for bitcoin. Depending on the hashrate during the change, it will stick to it and after another 2 weeks change again depending on how many are mining then. :)

Sorry to hijack the thread, OP may give out a more detailed explanation if he wants to. :)

This is how the difficulty is calculated,

The highest possible target (difficulty 1) is defined as 0x1d00ffff, which gives us a hex target of

Code:

0x00ffff * 2**(8*(0x1d - 3)) = 0x00000000FFFF0000000000000000000000000000000000000000000000000000

Pooled mining often uses non-truncated targets, which puts "pool difficulty 1" at

Code:

0x00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

So the difficulty at 0x1b0404cb is therefore:

Code:

0x00000000FFFF0000000000000000000000000000000000000000000000000000 /
0x00000000000404CB000000000000000000000000000000000000000000000000 
= 16307.420938523983 (bdiff)

You can read up more about Bitcoin difficulty here as well, https://en.bitcoin.it/wiki/Difficulty
Let me know if you have any other questions (:

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