Questions tagged [wallet-security]

How to keep wallets safe.

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3 answers
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Is it safe to reuse a Bitcoin address?

Besides the obvious privacy implications, and (according to a bitcointalk.org forum post) the fact that once an address is used your coins that rest on it safety depend entirely on the ECDSA safety (...
Felipe's user avatar
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8 votes
3 answers
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What stops a wallet from stealing bitcoins?

I'm not particularly knowledgeable on the topic of cryptocurrencies so it's possible that I've missed something obvious, but I still wonder what it is that stops a wallet from stealing from you. ...
Generic's user avatar
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5 votes
3 answers
973 views

What did I do wrong that caused me to lose bitcoin?

I've been accumulating bitcoin into a paper wallet for a couple weeks. It's all been stolen. I'm trying to figure out what I did wrong: https://www.blockchain.com/btc/address/...
sucks1717171's user avatar
4 votes
3 answers
325 views

How can I safely store and trade Bitcoin and other crypto currencies?

How can I safely store Bitcoin? Exchanges require me to deposit to trade, is this safe? If I can't trust exchanges, what is the best way to safely store my cryptocurrency and transact it?
Raghav Sood's user avatar
2 votes
1 answer
760 views

How can a third party spend BCH accidentally sent to a BTC address?

I transferred BCH to an Electrum wallet address and haven't ever received it because Electrum uses only BTC. As I have been trying to recover it, I looked up the transaction on explorer.bitcoin.com ...
t1zzee's user avatar
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1 vote
1 answer
142 views

Are all 'metal wallets' functionally equivalent?

Within the context of wallets, is it correct that a metal bitcoin wallet needs to store both public and private keys? I'm looking at some metal wallets and want to clarify that the're all basically ...
Nicholas Saunders's user avatar
1 vote
1 answer
950 views

How can you restore a password in MultiBit if you are given the wallet words BEFORE you even enter a password?

How is it possible to recover a wallet password when the wallet words are provided before you even enter the password? https://multibit.org/en/help/hd0.1/restore-password.html Restore password ...
Chloe's user avatar
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0 votes
1 answer
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What type of Bitcoin wallet is more secure than others?

What type of Bitcoin wallet is more secure than others among Paper wallet, Physical bitcoin, Mobile wallet and Web wallet ?
Questioner's user avatar
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9 votes
2 answers
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How can Trezor update firmware but never receive malware?

I understood from What is it about a Trezor that means it can't be infected by malware? that a Trezor would only interpret data as transaction details, but the Trezor also updates firmware. How is it ...
oks's user avatar
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8 votes
2 answers
750 views

Can a closed source wallet ever be completely trust-less?

Open source Bitcoin wallets are clearly in demand for obvious reasons. Users want to know what the code is intended to do and what may be possible. Is it even possible for closed source wallets to ...
Javier's user avatar
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7 votes
1 answer
2k views

Is it really safe to use vanitygen to generate your unique bitcoin address?

I've been wondering if using vanitygen to create your own bitcoin address with a unique prefix, is safe from being compromise by others? I'm currently using a shared wallet address from a trusted ...
Nikko Parin's user avatar
4 votes
3 answers
447 views

Which hardware wallets are technically capable of exporting the private key?

In light of recent events with Ledger, are all other hardware wallets susceptible to being able to export the private key as well, possibly with a firmware update? If the former answer is true for ...
Cigarette Smoking Man's user avatar
3 votes
4 answers
2k views

Is holding funds in a Bitcoin paper wallet safe?

If you received lots of bitcoins, like 100, and you are not comfortable holding them in your personal blockchain wallet, is it preferable to move them and hold them in a paper wallet for safety ...
letyouearn's user avatar
2 votes
2 answers
3k views

How does crypto exchange secure private keys?

I'm wondering on what is the current common apporach that is used by centralized crypto exchange to secure the private keys of the bitcoin wallets
0xgoku's user avatar
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1 vote
0 answers
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How to generate a very secure wallet with Electrum?

For a poor-mans glacier protocol, looking for: One private key – an alphanumeric string used to secure the funds The cold storage address – an alphanumeric string designating the virtual “location” of ...
Nicholas Saunders's user avatar
1 vote
1 answer
246 views

Xpriv can be calculated from the xpub + child private key?

I heard Michael Flaxman say that if an attacker obtains your xpub key as well as any one of your child private keys, they can calculate your master private key? Why is this not a huge deal? Where are ...
chaulmianmints's user avatar
1 vote
1 answer
3k views

Someone stole my bitcoin. Help?

I have been a victim of a phishing attack today, and the perpetrator stole my bitcoin hosted at coinbase.com. I have an IP address that the attacker used. Is there anything I can do? Any info would be ...
user16992's user avatar
1 vote
2 answers
508 views

How much space does a backup of a wallet usually take?

I have a Bitcoin QT v0.8.5-beta wallet (downloaded in 2013) which I will backup before trying to export the private keys to a Electrum wallet. I have found a backup button in the QT wallet, but it ...
Squirrelwalker's user avatar
0 votes
2 answers
447 views

Private key security level

Any of a kind Bitcoin wallet need to share private key on the internet-connected machine. Bitcoin client has no responsibility for to keep private key secure. If your's machine connected to the ...
Denis Leonov's user avatar
0 votes
1 answer
77 views

What's the point of Multi Signature Addresses?

When an attacker has access to the private key of the wallet, he can dump the private keys of every address used for the multisign address(es). So, what's the point of multi sign addresses when there'...
Otijun's user avatar
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0 votes
2 answers
546 views

How do exchanges use cold bitcoin wallet while still able to automate transfers?

Some exchanges mentions they use a cold wallet to keep the private key. As far as I understand cold wallet is a wallet either in an offline machine or kept in hardware. However, it appears that ...
Calvin Lau's user avatar
0 votes
0 answers
466 views

Starting bitcoind for the express purpose of creating a wallet?

Referencing this solution: My favorite method: grab out a old/unused pc/mac install a linux over usb (maybe Talis) (make sure your USB stick is clean!) download a recent version of bitcoin-core (...
Nicholas Saunders's user avatar
0 votes
1 answer
104 views

What needs to be written down for a paper wallet?

I'm installing bitcoin-core with snap on Ubuntu for a dry-run at generating a paper wallet. Perhaps naively, I thought to "write down" something like: nicholas@mordor:~/bitcoin$ nicholas@...
Nicholas Saunders's user avatar
0 votes
1 answer
68 views

Uncomfirmed Transaction

I sent 2.1439245 bitcoins to 1AEcB37MngXzuvailFr1f31qobvzBFXF4e9 on May 27 and the transaction has still not been received. I contacted the merchant that I bought from and they said that they have ...
Daniela's user avatar