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Questions tagged [wallet-security]

Questions about keeping wallets and e-wallets safe.

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20
votes
3answers
13k views

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 (...
5
votes
3answers
780 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/...
4
votes
3answers
243 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?
8
votes
3answers
3k views

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. ...
2
votes
1answer
656 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 ...
1
vote
1answer
107 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 ...
1
vote
1answer
906 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 ...
0
votes
1answer
61 views

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 ?
9
votes
2answers
2k views

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 ...
1
vote
1answer
289 views

How to generate a paper wallet?

What do you find the best way to generate a paper wallet for BTC? I've heard of this one: https://keybase.io/warp/warp_1.0.9_SHA256_a2067491ab582bde779f4505055807c2479354633a2216b22cf1e92d1a6e4a87....
8
votes
2answers
670 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 ...
6
votes
1answer
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 ...
1
vote
2answers
2k 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
0
votes
1answer
58 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 ...
3
votes
4answers
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 ...
1
vote
2answers
453 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 ...
1
vote
0answers
54 views

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 ...
1
vote
1answer
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 ...
0
votes
0answers
23 views

distinction in types of wallets: on a device, physical medium or in a program? [duplicate]

What is the distinction between a paper wallet, cold storage, and off-line storage? Perhaps I'm naively lumping them together. To my understanding, a wallet is: A cryptocurrency wallet is a device,1 ...
0
votes
1answer
62 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@...
0
votes
0answers
161 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 (...
0
votes
2answers
400 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 ...
0
votes
2answers
516 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 ...