Did you read the posts by LoyceV and me?
You should answer those questions and follow the steps if you want to recover your wallet and get your coins back.

You are right. I somehow missed that.
Unfortunately its not entire verifiable whether they fully run their open source code.
Cloning the repository and running their code offline seems to be a pretty sweet solution (https://github.com/blockchain/My-Wallet-V3-Frontend).

Probably wouldn't have thought about this without your correction 
This at least eliminates the risk of blockchain.info getting compromised.

Is there a reason you want to get the private key of your change address?
If its just to back your coins up, you just need the seed phrase which you got from blockchain.info when setting up the wallet.
To get the private key you can use https://iancoleman.io/bip39/, like TryNinja mentioned.

But i would suggest you switch over to a wallet which lets you (and only you) have the control over your funds.
You always need to remember that blockchain.info (just a company - has nothing to do with the 'blockchain') has full access to your private keys.
You have to keep in mind that you are relying on blockhain.info (as a company) to access your funds. This envolves trust at a point where you could easily rely on yourself instead of a 3rd party. [Edited for clarity]
Web wallets have a lot of additional attack vectors which 'standard' wallets (desktop-/mobile/hardware) don't have.
So unless there is a good reason for you to use a web wallet, a 'standard' wallet would be the safer option to store your coins.

If someone has physical access to your computer, its an easy task to install malware on it.
The best encryption is useless if your pc is infected with malware. The next time you open your electrum wallet, the attacker will gain the control over your private keys.

Its not just about password security (anti bruteforce).
There are a lot of things which all play together to keep an IT system safe.

You won't achieve 100% security. Ever. But if you are concerned about the security of your coins either use a Hardware wallet, paper wallet or a dedicated (airgapped) pc as cold storage.
Anything else will be WAY less secured than those 3 options.

Yes.




Yes. I believe even with bitlocker thats possible.




You should.




Preferably both.




Assuming the encryption (used algorithm and implementation) is flawless, yes they are safe.




A keylogger logs keystrokes. If they infect your laptop with a keylogger just before stealing it, they would only be able to log the keys they typed themselves..




Bitlocker encrypts drives.
While you are using your drives (e.g. system drive while using windows) the drive is not encrypted.
You can get infected with malware in that time.




Protecting from login shouldn't be your concern.
Especially not when using windows.
If you want to store high amounts safely, you should definetely spend a few bucks for a hardware wallet.

You can store your private keys within an encrypted container, if thats what you are looking for.
But i wouldn't recommend bitlocker (closed source; made by microsoft   )
I'd rather recommend VeraCrypt (https://www.veracrypt.fr/en/Home.html).




Just create a hidden container with VeraCrypt and store your 'sensitive information' there.
But keep in mind that, the moment you open the container, any malware you have on your pc will have access to this container.
Its better than storing sensitive files on the desktop, but not ideal.

VeraCrypt tutorial: https://www.bestvpn.com/veracrypt-how-to-basics/

First, start off with what wallet you were using. Did you use the old electrum version before?
Did you import any private key into your wallet?
Do you still have access to the old wallet file?
Does 'a portion' of your coins show up? Or are they 'all missing'?

It would simplify to help you, if you could awnser these questions first.

Did you read the thread?

---

I'd like to clarify this.
Ledger is a company. They are not responsible for storing any private keys. Ledger built the nano s (hardware wallet).
The private keys are stored on the device itself. Completely independent from ledger.
Additionally private keys arent used to prove the ownership of addresses.. they are used to sign transactions (UTXO's from the corresponding public key).

Actually transaction fees are at a low currently.
You get transactions confirmed within the next block with a fee as low as 10 sat/B. [1]
And with the incoming segwit adoption fees will stay that low (or get even lower).

What you might refere to are the trading resp. withdrawal fee from online services / exchanges?
Those fees cover more than just the withdrawal fee. For example things like Support, moving coins between hot/cold wallet, additional hardware, programmer, and the network fee.

The 'transaction fees' can only get lower with LN at the moment.

[1] Mempool: https://jochen-hoenicke.de/queue/#1,24h

The nano coins from binance have nothing to do with the ledger nano s.

Ledger = Manufacturer of the Nano S
Nano S = Hardware wallet from ledger [1]

Nano (cryptocurrency; available on binance) = DAG based crypto. Was named 'Raiblocks' earlier. [2]

Both are independend from another. Nano also isn't an ERC20 token.
As far as i know ledger currently is building an application to store nano on their nano s.

[1] https://www.ledgerwallet.com/products/ledger-nano-s
[2] https://nano.org/en

SegWit has a lot of pros. The lower size (and the associated tx fee) of segwit transactions is probably the most incentive for most users.
But SegWit softfork was the first step towards hashed timelock contracts [1]. The lightning network is one implementation of HTLC's.
Additionally, thanks to the 'block size' getting increased efficiently, this will open doors for better scaling during mass adoption.
Those are a few huge pros IMO.

I dont think there are noteworthy contra arguments to segwit at this time. SegWit is a crucial part of the evolving technology bitcoin delivers.


[1] https://en.bitcoin.it/wiki/Hashed_Timelock_Contracts

No. Thats far away from being as secured as cold storage.
There are many threats when using a hot wallet compared to cold wallets. You can't protect yourself from all of these.

2 examples:
- If there will be an electrum bug discovered (and exploited) your funds will be gone. Bugs occur. So do new vulnerabilities.
- Your OS (in your case: windows..) can be exploited through a variety of vulnerabilities if you aren't updating regularly. Even if you are, chances are high infecting your system is still possible.
The next time you would open/use electrum your private keys get compromised.

Those are just two examples of why you can't keep a hot wallet as secured as a cold wallet. There are way more attack vectors.

Don't put more money into your hot (desktop/mobile-) wallet as you would carry with you in your purse. Use a hardware wallet or paper wallets for safe storage.

Your electrum is synced. But you arent 'logged in into your account' which holds the btc balance.
You need one of the following to 'get your wallet back':
1) Seed phrase (of your old wallet)
2) Wallet file

Do you still have access to your old hard drive? Did it get corrupted? Or locally not accessable?
If thats not an option, you have to search for your seed phrase to recover your wallet.
In electrum you need to create a new wallet and choose to restore an already existing wallet. Afterwards enter the seed into electrum and you are fine.

The more handy way would be to run bitcoind in daemon mode:

and afterwards use API commands [1] to communicate via:


To stop the daemon you can type:



[1] https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_Calls_list

You don't really have to confirm an incoming transaction.
What you refere to is (probably) the verify procedure of your displayed 'receive' address.
This step is necessary to make sure no malware is 'manipulating' the screen.
If you confirm the two addresses (computer screen + on nano s) are the same (with pressing the button), you can be sure this address has been really generated by your nano s device.
You will have to confirm every newly generated address to make sure its properly generated by your nano s.

Additionally you have to confirm outgoing transactions.
But you don't have to confirm/accept transactions. Just verify your receive-address, give it to someone and receive coins.

This is indeed possible.
You can retreive the data thorugh an API (e.g. from CMC [1]).
You will be able to display the current price via the UrlFetchApp function [2]


[1] https://coinmarketcap.com/api/
[2] https://developers.google.com/apps-script/reference/url-fetch/url-fetch-app

There are quite a few companies who provide such a service.
For example:

• Elliptic: Is probably the 'market leader' in this segment (https://www.elliptic.co/)
• Chainalysis: https://www.chainalysis.com/
• Numsight: http://numisight.com/

Elliptic and Chainalysis seem to be the most trustworthy/reliable.
But i think the most efficient way would be to build a small program to extract the data you are searching for by yourself.

Could you outline this more specifically?
Are you talking about a blockchain of blockchains?
Or about simultaneously growing blockchains? What problem does this approach solve?




bcash is trash a forked chain. Up until to the fork height X all blocks are 'identical'. From X+1 those chains differ.
But these aren't parallel chains. 2 different chains which have the same history until block X.

Thats mostly the reason why you shouldn't just copy&paste 'fork' a coin without changing parameters.
ASIC stands for Application-specific integrated circuit. They are built for 'established' coins and/or widely hashing algorithms.




Yes, this is absolutely possible.
If its interesting for miners (regarding financial aspects) its even highly probable.




Usually those periods aren't directly measured in hours or weeks but in the amount of blocks.
For BTC the network difficulty adjusts every 2016 blocks (which corresponds to 2 weeks with 10 minutes per block).

If the difficulty adjusts after a specific amount of blocks the network would kind of be 'screwed' in such a case.




If network difficulty adjusts in a time unit, then yes.
If the difficulty adjusts after X blocks, then no. In that case it would take the time it needs to get the X blocks mined until the difficulty adjusts again.

You may still have luck finding the old wallet files on your harddrive.
The 11.9 BTC [1] unspent yet might be a change address of your old wallet.
I would suggest you make an image of your harddrive and try out some rescue software to find your wallet files.
Make sure to keep the original drive untouched if you are planning to submit this case to the police.


[1] https://www.blocktrail.com/BTC/address/137yraCHyyVRV69ssUbBooHsqUbp43WFSP

I guess its his group (or friend of the group owners). Just a poor attempt to get people convinced to join his group and take part in his shady abusive games.

General Information: Pump groups will only make one guy rich, the admin. Coins get pre-pumped and dumped while members are trying to take part in the pump game. 99% lose - 1% wins.
Don't take part in them if you don't want to lose most of your BTC's!