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Share Your Experience: Take the 2024 Developer Survey
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. ...
RedGrittyBrick's user avatar
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 ...
Jannes's user avatar
  • 6,344
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 ...
Pieter Wuille's user avatar
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 ...
MCCCS's user avatar
  • 10.2k
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 ...
David Schwartz's user avatar
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
Pandit's user avatar
  • 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 ...
SB Ph.D.'s user avatar
  • 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 ...
Jimmy Song's user avatar
  • 7,759
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 ...
David A. Harding's user avatar
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 ...
Brenny_Coinomi's user avatar
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....
MCCCS's user avatar
  • 10.2k
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 ...
Raghav Sood's user avatar
  • 17.1k
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 ...
Pieter Wuille's user avatar
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 ...
David Schwartz's user avatar
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. ...
AMADANON Inc.'s user avatar
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 ...
RedGrittyBrick's user avatar
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 ...
Mike D's user avatar
  • 3,569
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 ...
RedGrittyBrick's user avatar
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 ...
Davidson Souza's user avatar
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....
ieatpizza's user avatar
  • 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 ...
Raghav Sood's user avatar
  • 17.1k
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, ...
Willtech's user avatar
  • 3,279
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 ...
chytrik's user avatar
  • 18.3k
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 ...
Gemstone's user avatar
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. ...
Ava Chow's user avatar
  • 70.8k
1 vote

How can Bitcoin be stolen?

Bitcoin is never technically stolen, it is the private keys used for signing transactions which are.
Matthew Stannard's user avatar
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, ...
Rutger Versteegden's user avatar
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 ...
Highly Irregular's user avatar
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 ...
meshcollider's user avatar
  • 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 ...
Albert S's user avatar
  • 1,630

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