50
votes
Is there a 'BTC Refund Department'?
I have been scammed 6 months ago
Then criminals expect you to be gullible and foolish. You are a prime target for them. So they'll try new ways to trick you.
BTC REFUND DEPARTMENT
No such thing.
...
- 25.1k
31
votes
Accepted
Why can't we fight Bitcoin thieves by not accepting payments from hacked accounts?
Fungibility. Money needs to be fungible, otherwise it's not money at all.
Blacklists allow censorship and confiscation of wealth by centralized/powerful players (like governments) which will be ...
- 6,324
26
votes
Accepted
How do you derive the private key from two signatures that share the same k value?
ECDSA signatures are pairs (r,s) where r=(kG).x mod n, and s = (m + rx)/k mod n, where x is the secret key, k is the random nonce, and m is the message.
If you have two s values s1 and s2 for the same ...
- 102k
20
votes
My BTC was stolen using my Blockchain pairing code
Blockchain.info pairing code allows you to sync wallets. For example, it's for when you have coins on your phone and you want to be able to spend them from your computer. So, they synced their wallet ...
- 10.1k
18
votes
Why can't we fight Bitcoin thieves by not accepting payments from hacked accounts?
It wouldn't work.
Imagine if you get to a grocery store and try to pay in cash and they say, "Sorry, your dollars are no good, their serial numbers are on a list of bills that have been stolen". You ...
- 51.4k
10
votes
What are the most notable cases of Bitcoin scams?
Here all famous scammers/sites:
List of Known Bitcoin Scams: Beware of Fraudsters!
Bitcoin Scammers list
- 191
6
votes
Why can't we fight Bitcoin thieves by not accepting payments from hacked accounts?
It really isn't possible to create a blacklist of stolen bitcoins. While it is possible to easily trace stolen bitcoins, thieves can utilize a number of services, such as bitcoin mixing services, that ...
- 161
5
votes
Why can't we fight Bitcoin thieves by not accepting payments from hacked accounts?
Bitcoin is decentralized. There is no "we" to appeal to even if we wanted. You may be able to convince a miner to not include txs that go to certain addresses. That is their right. But that certainly ...
- 7,749
5
votes
How do you know that your private key has been stolen?
If your private key was stolen, then the thief can provide you with definitive proof that he possesses the key---for example, by spending your funds.
But unless you have such proof, all you can do is ...
- 11.8k
3
votes
I had bitcoin stored on my phone, but then lost my phone, please help
Sorry to hear that you have had your device stolen. When using Coinomi all you need to be able to restore your funds on a new device is the 24word recovery phrase which you were given when you set up ...
3
votes
Accepted
My friend's address was spent right after I paid him. What happened?
If I read it correctly, your friend had an address, to which you paid. Then someone took it from their wallet?
It might be because your friend's device is hacked or he doesn't use a trustworthy wallet....
- 10.1k
3
votes
What prevents broadcasting of fraudulent transactions
When broadcasting a tx, a regular node checks for two things: Is the transaction standard, and is the transaction valid.
Standard transactions are, for simplicity's sake, transactions that create ...
- 16.9k
3
votes
What prevents broadcasting of fraudulent transactions
Validation.
You can totally broadcast a fraudulent transaction, but nodes in the network will ignore it as it is invalid.
Furthermore, nodes will also ignore any blockchain which contains any ...
- 102k
3
votes
BTC Stolen from Blockchain
I'm sorry you were scammed. One of the reasons that many experts don't think bitcoin is ready for mass adoption or retail use is precisely because people don't understand how to keep them secure.
You ...
- 51.4k
2
votes
Who is liable my case or is it a classic hack?
If the blockchain shows the money was in your account, then they have fulfilled their requirements. At that point, any transfer of money OUT of your account needs to be signed by your private key. ...
- 410
2
votes
How to know what wallet a Bitcoin transaction is at now
How can I track to what bitcoin wallet
You cannot.
and where that wallet is registered at?
You cannot tell from the address alone,
Wallets are not "registered", anyone can download wallet ...
- 25.1k
2
votes
Accepted
How do institutional investors prevent theft by employees
If the company follows good security practices no single person would have access to the cold wallet where 90+% of the funds would be stored.
There might be single employees with access to the hot ...
- 3,529
2
votes
An unexpected transaction removed money from my wallet
If you didn't create the second transaction it means that one of the following probably applies:
Someone else has, at some time in the past, known a previous or current password for your Exodus ...
- 25.1k
2
votes
Accepted
Bitcoin multisig scheme that prevents theft by middle-man operator
I can think about some possibilities.
You can use an DLCs (Discrete Log Contracts) with your platform as oracle. Each output can be redeemable by any part at any time, if you sign an attestation ...
- 951
1
vote
Is it true that if I buy Bitcoin and plan to hold it for 10 years and sell, then Coinbase, Robinhood, or Gemini can prevent any theft?
No. If your stock broker account (such as Robinhood) is hacked or stocks are transferred or sold from your account without your authorization, you have a lot of legal recourse and liability protection....
- 2,068
1
vote
In the case of a criminal investigation, how does one knows which exchange or wallet service a bitcoin address belongs to?
There is no guaranteed way to check.
In most investigations, it is a combination of tracing the money to known addresses (most exchanges and companies consolidate funds into a handful of hot and cold ...
- 16.9k
1
vote
Missing btc in personal wallet
If you did not send the Bitcoin's then someone has access to your account or private key. This could happen many ways, if you have ever shared your login details with anyone or, your backup seed, ...
- 3,231
1
vote
transaction that was included in a block without my permission
Note that there is a difference between a wallet and an address. Namely, a wallet may control the keys for many addresses.
Checking the address you posted, it clearly has no bitcoins in it, as they ...
- 18k
1
vote
How can Bitcoin be stolen?
I believe the large threat of theft of Bitcoin or digital assets is through hacking into your account located on an exchange or possibly your wallet. I do not believe you find theft at this point in ...
- 11
1
vote
How can Bitcoin be stolen?
Firstly, there is no "each Bitcoin". On a technical level, there is no such an object as "a Bitcoin". Rather it is a ledger of transactions, and the Bitcoin that people own are entries on that ledger.
...
- 68.5k
1
vote
How can Bitcoin be stolen?
Bitcoin is never technically stolen, it is the private keys used for signing transactions which are.
- 735
1
vote
Accepted
Bitcoin Stolen from Wallet, where do I stand?
It seems that your coins are indeed long gone, and have traveled to, and through various exchanges. There's really nothing you can do.
If you're interested as to where they went, take a look here,
...
- 1,071
1
vote
Where did my money go after I sold bitcoins to BitZIZ into PayPal?
Looks like there are multiple cases of other customers reporting the site as a scam, so it's likely you'll never get a response from them, unfortunately.
Because most cryptocurrency transactions are ...
- 10.9k
1
vote
Accepted
What prevents real-life robberies in the hypothetical future where Bitcoin is widely used?
Robber A now knows the address of the vendor. Robber A can sit and wait until someone (Victim A) purchases something from this address and has a very large Bitcoin balance.
Most vendors would ...
- 11.8k
1
vote
Bitcoin's disappeared from unused wallet
Looks like the tx you are referring to on 2014-03-24, sent the money to
14N9ydxNRhDxkKJvXg1vjqS3gh884vG3UM - (Unspent) 0.039 BTC
1L9Q6EFMH3jn4dWquC2DaWhWK4q4pyUvum - (Unspent) 0.00060405 BTC
They ...
- 1,630
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