For anonymity in bitcoin we will have to wait for at least two improvements: Schnorr as a basis for coinjoin can bring a pretty decent privacy level to bitcoin. This, of course, requires the majority of people making use of this feature. But with lower transaction fees this should be incentive enough. I think both is going to happen in the short-mid future. |
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my available balance is correct, The only problem is that watch-only balance. There is a way to delete it from my wallet?
As far as i am concerned it is not possible to remove a watch-only address from your wallet. But you may ask achow101. He was looking for a solution for this too, once. He might have found one. But im not sure if there is one (without damaging your wallet file). |
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Somehow an address got imported (as watch-only).
When you tried out an exchange yesterday, may it be possible that you accidentally (after sending funds) imported the deposit address (or any other one) as a watch-only?.
Is your available balance (non-watch-only) correct?
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You have two options to achieve the functionality. The first would be to use btcrecover ( https://github.com/gurnec/btcrecover). It allows to create a token file to reach all of your criteria. You can read about the token file here: https://github.com/gurnec/btcrecover/blob/master/TUTORIAL.md#the-token-fileThe second would be to modify the function generateAllPossibilities in your script. Simply add another argument (the lost character). Or just iterate through the wordlist (created without your special character) and add your char at the end of each combination. |
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I'm not sure about that but I do not think we will need to download the entire network of blockchain when we use the lightning network.
If you want to open a channel on the lightning network you need to have the full blockchain stored. But there will be lightweight clients to access the LN, for sure. Just like it was with wallets. To have a synced wallet on your PC you need the blockchain. Or you rely on a 3rd party to give you the information you need. The same applies to the LN. To open up a channel without the need of trusting anyone, you need the whole blockchain. But if you rely on information from 3rd party server you can use a lightweight client (e.g. https://github.com/mit-dci/lit). Note, that this client is still being developed and every software on the LN should be used carefully. |
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This is the second news over the past two months about the vulnerability of this wallet.
Well, this still is the same vulnerability (which already has been fixed). Its just a repost. Despite the company's statements about the reliability and security of the wallet, Saleem Rashid demonstrates the opposite.
After such news, I would not recommend using this wallet, in spite of some of its advantages.
While this vulnerability indeed could have lead to a theft, the attacker still would have needed physical access. Just because a vulnerability has been found, this doesn't mean ledger is no longer recommended. Nothing is 100% secured. Its not about IF a vulnerability will be found, its about WHEN it will be found. Every wallet had/has/will have a vulnerability. The question is who finds it first. White- or black hat. |
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Can't agree with this. If SSD controller get broken there no way to read this SSD.
All data will be lost permanently and forever.
I thought you were talking about cells which do break after a certain amount of write cycles. If the SSD controller is damaged the SSD (itself) can't be used, thats right. But its not true that the data is lost. If the controller is broken and the cells aren't damaged, you are able to extract the cells and access them directly. You don't need the controller to ensure the integrity of data stored on these cells. Law enforcement agencies do have tools to directly access each cell of a SSD. HDD is much "safer" if we are talking about data restoring.
That mostly depends on each individual case. It is easier to restore deleted data from HDD's, yes. But its also easier to delete data from HDD's permanently. Both is not that easy to accomplish with a SSD. HDD's and SSD's do have different pros and cons. So if you are using SSD you must have backup of your wallet in some safe place.
You should always have a backup of your wallet. Completely independent from the type of storage you are using. |
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Printing would probably the easiest method, and the most secure would be having an encrypted private key (never heard of encrypted seeds).
You can encrypt anything you want. Encrypted seeds are known for quite some time. Most of the time it is being referred to the '25th word' or simply as 'additional word'. But basically its 'just' a password for the seed. I think it's not an 'additional word' because an encrypted seed was the mnemonic seed that got into a so called pseudo random process so it's not 'just a password' instead it's the Bitcoin wallet seed itself or we can consider it as a master password for Bitcoin Wallet besides the private keys that can serve as a password for every bitcoin addresses. I am sorry, i expressed myself unintelligibly. I was referring to the 25th word known from hardware wallets (like the ledger nano s). These wallets offer to the possibility to add a password (up to 100 characters) to add plausible deniability through generating a different seed for each password. But nonetheless anything can be encrypted. A seed which has been encrypted (with any symmetric encryption algorithm) will result in a character sequence (depending on which algorithm) which then can be decrypted using the password. |
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With prune mode you are not able to use some full version opportunities. For example -zapwallettxes method (as i remember). Also i'm not sure about creating raw transaction on prune node.
The use of -zapwallettxes implies the use of -rescan, which is not possible on a pruned node (which only stores the last 550 blocks). But creating raw transactions is still possible on a pruned node. Simply because the node stores all relevant information (UTXO's, etc.. ), regardless of pruning. It is better to use 256 gb SSD than 1 TB HDD. Synchronization will be much faster. In another hand, SSD more "dangerous" because there no way to read broken SSD.
While i agree with SSD's being 'more useful' overall, a broken HDD can't be read easily either. SSD's survive a good amount of write cycles. Without downloading the whole blockchain daily, there shouldn't be a big risk of disk failure in the near future. SSD's have more cells than they actually need to reach the desired storage space. The SSD controller is allocating the cells 'on demand' in the 'best possible way'. |
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What i had heard, was that if you only withdraw some of the amount from a paper wallet, the change might somehow ended up on another address?
This happened to quite a few people. They didn't sweep the coins (sweeping: wallet creates a transaction to a self-generated address within your wallet), but imported the private key into the wallet and then made a transaction (not using the full amount). What happened was: The wallet created a TX with the input from the imported paper wallet and two outputs (standard), with one destination amount and 1 change outpout to a change-address of the wallet. But those people thought the 'remaining' amount still is on their paper wallet. This was simply due to not understanding how bitcoin/transaction works. So, if you follow ONE of these two steps, you are fine: 1) Sweep the paper wallet. From this moment your paper wallet is 'empty' 2) Import your private keys and either spend the full amount OR keep a backup of the wallet used for importing (because of change address) |
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the private keys was generated with out internet connection.
Note that it is not enough to simply use an PC which was online before / will be online after generating your keys offline. Anything used to generate your private keys should be completely airgapped from your network. Printing would probably the easiest method, and the most secure would be having an encrypted private key (never heard of encrypted seeds).
You can encrypt anything you want. Encrypted seeds are known for quite some time. Most of the time it is being referred to the '25th word' or simply as 'additional word'. But basically its 'just' a password for the seed. |
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Your words are very useful, in fact everything is clear about PoW, but PoS ! is it illegal or piracy or something like gambling...
PoS miners use their own coins for attracting fees of transactions ?? it's not clear enough for me.
PoS just describes how the person is chosen who is allowed to create the next block. This happens through their staked amount. If person X has staked all of his coins (and those staked coins equal 10% of all staked coins) then he has a 10% chance of being allowed to create the next block. The transaction fees are being collected by the block creator, regardless of whether its PoS or PoW. |
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a last question: so it is not a problem that i have the new wallet.dat created by using the ledger? or is the setup now less secure?
Its not a problem to create an electrum wallet (not wallet.dat) with the ledger nano s. And its also not less secure because your private keys never leave your hardware wallet. Without physical access to your nano s (or your backup seed), an attacker wouldn't be able to steal any coins from you, regardless of wether he has access to your pc or not. |
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I'm trying to send some BTC from my Ledger (never sent before). It asks to confirm 2 transaction: 1st one with my address and amount I want, and the 2nd one - random address O_o
2 outputs
As others already have mentioned, this is the change ( https://en.bitcoin.it/wiki/Change) of your transaction. But this should only happen with older versions. When did you update your ledger the last time? Check your version (and update if you havn't done this yet): - Nano s firmware: 1.4.1
- Ledger manager (chrome application): 1.1.1
- Ledger bitcoin wallet (chrome application): 1.10.6
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Im just looking forward to see how further soft-forks will be deployed. Segwit was one of the biggest dramas ever in cryptocurrency, and if im not mistaken, we will go through something similar too when attempts to get privacy at protocol level through soft-forks are brought up again.
What exactly - regarding segwit - was a drama? I remember the segwit2x drama, where the date for the hardfork was set and then got cancelled. I think a few weeks later there still was a hard fork? I'm not sure about that. Wasn't bcash also created because of this? But segwit itself (soft fork) happend pretty smooth i thought? Correct me if im wrong. I am also looking forward to the next two milestones of BTC which are the faster merkle tree (BIP98 [1]) and schnorr (BIP140 [2]), i think. Note, that schnorr itself doesn't bring privacy into btc itself. The ability to use coinjoin with schnorr is what will be a privacy feature. [1] https://github.com/bitcoin/bips/blob/master/bip-0098.mediawiki[2] https://github.com/bitcoin/bips/blob/master/bip-0140.mediawiki |
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I sent it to Electrum, and next time I checked it was gone. The hacker has then sent small amounts to different addresses. I downloaded the wallet from the official website itself, and not a phishing site.
Unfortunately your coins are lost. But if you want to find out what exactly happend, please answer these questions: - Did you verify the file after downloading?
If not, check the signature. This eliminates the risk of using a malicious version of electrum. - Did you have a password set?
- Which OS are you running?
- Which version of electrum did you use?
- Did you already scan your PC for malware?
If not, do it.
This won't help you to get your coins back. But knowing what happened is the first step towards securing your coins better the next time. |
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Think you are somewhat mistaken. The NEM balances are definitely being monitored and there are even some suggestions that they have already started making their moves, though seemingly to random addresses and not sold on exchanges
The 500M usd worth of NEM is being tracked. Cryptocurrency is only as safe as the person holding it is.
OP might be refering to this kind of news: The NEM Foundation has announced it will no longer track cryptos stolen from the Japanese exchange Coincheck.
The Singapore-based organization said it had provided law-enforcement agencies with information from its investigations.
It did not explain its decision to end the tracking efforts. According to some estimates, half of the NEM coins that disappeared in the hack have been laundered on the darknet. Source: https://news.bitcoin.com/nem-foundation-stops-tracking-coins-stolen-coincheck/Whether these are real news or faked (maybe to trap the thieves)? I don't know. But quite some sites were posting stuff about NEM foundation stopping to track the coins. Without any explanation (except for: information have been given to law-enforcement agencies). |
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i need Bittrex clone setup same like bittrex.com
please tell me who can provide i need urgent
currently i no have gig budjet i need script for start trading website like bittrex i need readymade script
Are you trying to copy bittrex one-to-one? I would not suggest doing this. This can get you in big trouble. If you are trying to scam people via a pishing site, the authorities will hunt you down. If you want to start an exchange, you should not rely on random stranger on the internet. 1) An exchange is not cheap. You need a professional programmer team (security by design). This costs quite some money. 2) A random mediocre developer won't have the ability to create a secured exchange. There will be security flaws which may drain all of your cryptos from your exchange. If you really want to start an honest exchange, you need to hire a professional team. Don't expect this to cost less than 10k$. |
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I upload the list of wallets and related amounts to be transferred to an application then press button [send]
What exactly do you define as 'wallets'? Are you talking about wallet.dat files? Or private keys? seeds? If you are talking about private keys/seeds you could write a small script (e.g. in python) using a bitcoin libary. This would not be more than 20-30 lines of code and would achieve what you want to accomplish. Its not as easy as pressing a button.. but still doable for a non-techy person. |
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No online transactions are 100% safe. It's only up to you how to maintain your account.
Did you even read the thread/OP? Bitcoin doesn't have anything like 'accounts'. There are private-/public keypairs with UTXO's. The whole sense of bitcoin is to generate a trustless (financial) system. After a certain amount of confirmation a transaction can safely be considered as approved and therefore. Theoretically, of course, there is no 100% security/safety. But a transaction with 60 confirmations does have a chance of 0.18% to being 'reversed' with an attacker controlling 40%(!) of the networks hashrate. The bitcoin whitepaper includes calculations on how safe those transactions are. There is a formula and even an implemented version in C: #include <math.h>
double AttackerSuccessProbability(double q, int z)
{
double p = 1.0 - q;
double lambda = z * (q / p);
double sum = 1.0;
int i, k;
for (k = 0; k <= z; k++)
{
double poisson = exp(-lambda);
for (i = 1; i <= k; i++)
poisson *= lambda / i;
sum -= poisson * (1 - pow(q / p, z - k));
}
return sum;
} with q = hashrate of attacker in % and z = amount of confirmations Source: https://bitcoin.org/bitcoin.pdf (S. 7) You can even calculate the probability here: https://people.xiph.org/~greg/attack_success.html |
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