3. Are all the adresses (who would be generated) from 0 to 0xFFF... already generated? Could I land on wallets that are not existent if I bruteforce numbers?
There are 2^160 addresses in total. That number is incredibly huge. Let's say everyone in the world (7 billion people) are creating 10000 addresses every second and the addresses created are all unique, it will take 6.620559 * 10^26 years to generate all addresses (=2^160 /7000000000 / 10000 / 60 / 60 / 24 / 365). For comparison, our universe has an age of 13.798* 10^9 years only ( http://en.wikipedia.org/wiki/Age_of_the_universe). So any address I search in blockchain.info for example is whether not generated yet, or is generated and empty? And after looking around a bit, and taking in count all BTC addresses with actual balance, I have rounded up that if someone decided to bruteforce the whole numbers existing that generate private keys, they have a chance of ~~ 1 / (3 x 10^38) of finding a wallet with actual balance. You can search any valid address on blockchain.info. Among the 2^160 valid addresses, only a tiny fraction of them has an associated private key generated. Among them, only a fraction of them has been used. For example, address 1BitcoinEaterAddressDontSendf59kuE is a valid address but no one has generated a private key for it. Every person can send bitcoin to it, but no one can send bitcoin out of it (unless someone generate the private key with a incredibly tiny chance). On the other hand, I have the private key for the address in my profile, but I haven't spent any of the bitcoin on it yet. |
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I am not an expert, but the following are what I know. We all know that every BTC address has its own unique private key.
Not true. Private key is 256bit while address is 160bit, so there are many different private keys that are associated with the same address. Why 0xFFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFE BAAE DCE6 AF48 A03B BFD2 5E8C D036 4140? Why not 0xFFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFE FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF?
http://www.reddit.com/r/Bitcoin/comments/22nezb/just_got_my_16_sided_dice_extra_secure_paper/cgp1btoI see, it's all about the curve's definition. Simple enough. Question : How can different private keys have the same address? Maybe the same wallet yes, but when you pick a number, that same number generates both the Private key and the address. If two numbers (or words) collide with the same hash, why would they collide only in the private key generation, and not the Bitcoin address? How to get the address from the private key: https://en.bitcoin.it/wiki/Technical_background_of_version_1_Bitcoin_addressesPrivate key is the random number you generated. Address can be computed easily from your private key (but not the reverse). Even when the inputs (private keys) are different, the outputs (address) could still be the same. A very bad example would be (-2)^2 = 4 = (2)^2 while -2 ≠ 2. We know there are slightly less than 2^256 private keys and 2^160 addresses, so theoretically speaking there are an average of 2^96 different private keys that will give the same address. However, AFAIK, there is no reported case of collision yet (because the chance is extremely low), and so we are not really sure how they are distributed. |
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3. Are all the adresses (who would be generated) from 0 to 0xFFF... already generated? Could I land on wallets that are not existent if I bruteforce numbers?
There are 2^160 addresses in total. That number is incredibly huge. Let's say everyone in the world (7 billion people) are creating 10000 addresses every second and the addresses created are all unique, it will take 6.620559 * 10^26 years to generate all addresses (=2^160 /7000000000 / 10000 / 60 / 60 / 24 / 365). For comparison, our universe has an estimated age of 13.798* 10^9 years only ( http://en.wikipedia.org/wiki/Age_of_the_universe). |
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Well, i agree hardware is always better but what you gonna do when you can't afford to pay electricity
I have old miners laying around only prefers cloud these days atleast covers weekly gambling funds.
When the bitcoin you can mine is worth less than your electricity cost, you should shut the miner off and try to sell it on eBay or in computer hardware section here. Someone with a lower electricity price may be interested in it.  |
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The question is, why would you need an offline wallet ?
Try TREZOR, it gives you the security as an offline wallet but allows to spend coins in an easy and safe manner as well.
I agree that Trezor wallet is very secure and easy to use, but it comes at a price of $119. If you have 1 btc to keep safe, that $119 price tag would be 36% of your bitcoin investment. If you have 10 btc, it would still be 3.6%. That's why many people choose to use paper wallet or offline wallet instead. |
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I am a newbie and beginner when it comes to BitCoin but I started a website bitcoinusd.org. I'm trying to help educate people about Bitcoin as I learn. Anyone feel like taking the time to help me understand the ins and outs of Bitcoin? P.s. It's still under construction so don't mind the crappy look and grammatical errors The youtube video you embedded is the old version of "What is Bitcoin?" uploaded in 2011. It is better to use the updated version http://www.youtube.com/watch?v=Gc2en3nHxA4. |
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Helho peopple, hope best for all
Im new about bitcoin, have 2 question
Where i can create my frint account to use bitcoins?
I have 2 paysafecards
1 with 25£ GBP
1 with 10£ GBP
i liked to send to my bitcoin account, but how?
Thank you very much people
Before buying bitcoin, you should first learn the following: 1. visit https://bitcoin.org/en/choose-your-wallet to learn the pros and cons of different wallets, and choose one you like. Some are more secured, some are more easy to use. 2. learn how to use the wallet you chosen 3. learn how to keep your bitcoin safe (encrypt your wallet, create backups, set up 2FA for web wallet) Then you can use localbitcoins to buy bitcoin with your paysafecards. |
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I am not an expert, but the following are what I know. We all know that every BTC address has its own unique private key.
Not true. Private key is 256bit while address is 160bit, so there are many different private keys that are associated with the same address. Why 0xFFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFE BAAE DCE6 AF48 A03B BFD2 5E8C D036 4140? Why not 0xFFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFE FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF?
http://www.reddit.com/r/Bitcoin/comments/22nezb/just_got_my_16_sided_dice_extra_secure_paper/cgp1bto |
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If a newbie gambler wants to play with bitcoin gambling sites, where should I play? Preferably dice games, with affiliate program or signature campaigns and with chat and invest?
The most trusted dice site IMO is Primedice. It has an affiliate program and a chat, but you can't invest in it. If you want to invest, you may try PRC Dice. |
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Is blockchain.info the best online wallet for hot wallets?
Is blockchain.info the best online wallet for hot wallets?
It is one of the best as its open sourced with features with two factor authentication, no one would able to access your coins. Compared to coinbase, which have full access of your coins, blockchain.info do not have unencrypted private keys which means a hacker who can hack into blockchain.info online wallet would possibly never get your BTC. The best online desktop would still be Bitcoin Core, you would be getting the fullest control over your private key as no one else have access to your private key regardless of whether it's encrypted. Blockchain.info still have control over your encrypted private key but it would be hard to brute force. For the best online wallet with best security, blockchain.info would be recommended. Well said. Apart from blockchain.info, there are also some mutisig online wallets now such as BitGo ( https://www.bitgo.com/) and GreenAddress ( https://greenaddress.it/), which allows you to control your bitcoin. |
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Yup, with a suitable share difficulty setting, you only need very little bandwidth for pool mining. |
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shes on her way out currently suffering from lukemier, when she dies i get 40 grand to invest in bitcoin hopefully she passes before christmas that would be nice present for me.
at 300ish dollar a pop its a bargin i just hope it stays at that or goes even lower
well im fedup with my family when i get the 40 grand i can invest, wait for the price to go up and cash in my wealth and then buy my own house and live a life of drink and escorts.
That sounds really terrible. How bad is your relationship with her for you to say "hopefully she passes before christmas that would be nice present for me"... Are you sure you really hope to have her passed away soon? |
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^ According to the OP, you need to have a level of 30 activity to participate the giveaway. |
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To many possibilities to earn BTC or any other coin.
Faucets and giveaways are something that can be found on every step.
Sig and some work is good. YOu get paid for some job or offer you services to others.
The best way is to sell products, provide services and get a job for bitcoin. Sig campaign is also a nice way to earn bitcoin. There are occasionally some nice giveaways in https://bitcointalk.org/index.php?board=71.0. Usually there are activity requirement and rollover requirement for casinos' giveaway. You can only get a tiny amount of bitcoin from faucets, and so I wouldn't suggest you to spend much time on them. |
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In my honest opinion (IMHO) I think that this is the best method:
- Cloud mining
- Signature Campaign
- Invest in a dice casiṇ
But avoid the third choice, it has too risk.
3rd choice is actually awesome, unless you are talking about gambling it.. There is a risk in investing in a casino as the casino owners may run away with your bitcoin. You can take a look at the dice ninja thread to see what happened there. |
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actually, I am Chinese and I found it is hard to use CNY to deposit to buy BTC  maybe you will ask why don't use Chinese exchangers or why not ask in a China forum. cause I suppose the foreign one is more reliable. AFAIK, there is a Bitcoin ATM which you can use to purchase Bitcoins. If there isn't, localbitcoins.com would be the best choice. fine, thank you so much  According to http://www.coindesk.com/bitcoin-atm-map/, there are only 4 places you can find a bitcoin ATM in China, which is Beijing, Shanghai, Macau and Hong Kong. If you don't live near those 4 cities, the best option IMO is to use localbitcoins. |
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Don't trust your Anti-virus software 100%. They don't work that great. http://www.forbes.com/sites/ciocentral/2014/05/21/duck-test-antivirus-software-wont-detect-advanced-malware/The caveat here is that it is possible that AV vendors can achieve better detection rates than those measured here because those vendors may use other external signals and/or more aggressive configurations to detect malware-like code and behavior. Nevertheless, simple analysis of the raw data reveals a significant trend of missed malware and slow detection rates:
On Day 0, only 51% of AV scanners detected new malware samples
It took an average of two days for at least one AV scanner to detect malware that went undetected on the first day
Detection rates bumped up to 61% after two weeks, indicating a common lag for AV signatures
In one year, no single AV scanner caught every new malware sample in even one of the test days
After a year, 10% of the scanners still do not detect some malware
The 1-percentile of malware least likely to be detected was undetected by the majority of AV scanners for months, and in some cases was never detected
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