Tag: doublespend

56 Can bitcoins be counterfeited? 2011-08-31T00:33:41.057

40 How does Ripple solve the double-spend problem? 2013-02-11T09:59:22.937

34 What is a Finney attack? 2012-10-03T09:03:21.703

28 Has there ever been a successful double spend attack on the Bitcoin network? If not, is it really necessary to wait for confirmations? 2011-09-07T21:38:18.830

26 What is a double spend? 2012-10-05T12:20:32.830

23 What are the pros and cons of Ripple's consensus as compared with Bitcoin's proof-of-work? 2013-04-24T21:11:46.640

21 What does the Bitcoin client do when it receives conflicting transactions? 2011-09-08T00:33:05.117

18 Are there alternatives for proof of work? 2013-03-20T18:17:43.450

16 How do I detect a double-spend? 2013-09-17T21:26:37.207

15 Would a reduced block generation time make the Finney attack more difficult? 2011-09-21T23:54:00.863

14 Does any pool accept higher-fee transactions of a double spend, instead of the earlier one? 2012-05-10T11:45:29.937

13 How to minimize risk when accepting zero confirmation payments? 2014-04-27T14:19:16.840

11 In a double spend attempt, how is the valid transaction chosen? 2011-09-12T01:27:51.620

11 Double spend attack by sending higher fee transaction directly to the pools possible? 2012-03-29T08:14:15.450

11 Bitcoin without mining 2014-01-24T11:01:14.773

10 What is the Ripple equivalent of the "51% attack?" 2013-04-24T21:34:06.953

10 Why is Poisson instead of Negative Binomial used for computing attacker's potential progress? 2016-03-22T04:04:12.317

9 Is there a service that alerts about attempted double spends for merchants accepting 0-confirmation transactions? 2013-04-19T01:49:16.503

9 How does BitCoin prevent fraud during confirmation period? 2014-04-26T16:05:42.243

9 Could any standard fee transaction be double spent by using a higher fee? 2014-06-12T02:16:19.633

9 How do miners detect double-spending? 2016-03-31T22:05:17.907

8 How does blockchain.info detect double spends? 2012-03-02T08:38:33.320

8 What is the best way to recover from an accidental double-spend? 2012-05-13T20:38:34.597

8 Is performing a 51% attack / double spend on Bitcoin illegal? 2012-07-29T23:21:02.093

8 How do people actually try double-spends? 2014-01-22T04:25:30.997

8 Merchant tool that will dynamically adjust the # of required confirmations based on network hashrate data 2016-05-21T20:20:10.257

7 Do no-fee transaction represent a greater risk if the product is delivered instantly? 2011-11-03T11:24:46.647

7 How does Open Transactions solve the double spend problem? 2012-01-27T10:02:21.457

7 Possible to create a double spend attack by replacing a Tx in the merkle tree? 2013-03-19T17:02:28.747

7 Does using Ripple to accept Bitcoin reduce risk of Bitcoin fraud? 2014-05-29T13:51:47.413

7 How is a Transaction Output Marked as Spent? 2014-06-30T15:22:08.590

7 Speeding up confirmation by double-spending a transaction stuck in mempool 2015-05-22T03:29:59.027

6 What does a double spend look like? 2012-05-29T17:05:00.530

6 What precautions to take when working with only one or two confirmations? 2013-09-19T06:06:09.427

6 Double Spending - Does each node maintain a list of unspent transaction references? 2014-11-24T20:31:15.790

6 Why doesn't bitcoin place additional constraints on competing block chain forks, other than length of chain? (e.g., time and confirmation count) 2015-01-17T23:40:23.343

5 How to perform a double spend attack in websites that accept transactions with 0 confirmations? 2011-11-03T13:39:14.293

5 How to clear invalid transactions from one's wallet? 2012-05-17T23:09:00.150

5 What to do about a "stuck" transaction? 2012-07-11T02:59:07.353

5 What can happen if/when a node is surrounded by rogue nodes? 2013-01-18T22:42:54.640

5 Can someone explain this double spend on blockchain.info? 2014-01-02T01:11:29.580

5 Double spend transactions flag the node as "bad"? 2014-06-26T06:48:24.673

5 What exactly happens when a node detects a double spend? 2015-01-09T18:28:17.377

5 0/confirmation race attack double spend transactions 2015-11-13T12:30:49.583

5 Double Spending before confirmation 2016-05-19T05:06:27.707

5 Understanding a Bitcoin Double Spending Transaction by Performing one on yourself 2016-12-26T16:29:02.323

5 Possible error in the white paper Calculations section? 2018-05-27T23:22:32.010

4 How to force bitcoind to include a specific transaction as an input of another transaction? 2012-08-28T15:27:36.363

4 How does the Bitcoin client check for double spend? 2013-01-24T18:17:01.773

4 Is Bitcoin the first e-cash scheme which solved the double-spend problem? 2016-10-11T17:20:00.933

4 It's possible to spend a BTC without fee to forge a payment? 2017-02-10T16:43:43.797

4 Broadcast a signed transaction 2017-02-21T15:49:22.713

4 Low fee Electrum wallet transaction disappeared, now when I increase the fee it seems to be rejected as a double spend 2017-03-04T11:26:15.167

4 Why most bitcoin wallet apps don't have Replace-by-fee feature? 2017-04-23T21:12:23.850

4 Is something gained by double spending myself on a 51% attack? 2017-06-29T14:40:08.303

4 Why isn't the block hash used to calculate accumulated work? 2018-12-12T21:29:11.130

3 Double spending from "green addresses" & mitigation 2012-12-31T16:18:05.830

3 How is it possible to detect system wide segmentation? 2013-03-11T04:42:36.863

3 How to ignore balance check to cancel unconfirmed transaction (double spending) 2014-01-30T06:58:38.027

3 Which clients offer a way to replace unconfirmed transactions? 2014-02-26T05:31:45.823

3 How is over-spending one block apart prevented? 2014-03-24T21:30:52.640

3 How does CryptoNote prevent a 51% attack and double-spending? 2014-08-04T14:24:16.520

3 JSON-RPC to detect double-spent TXs 2014-11-20T12:27:57.880

3 What happens if a miner confirms their own double spend? 2015-01-07T22:08:36.027

3 Blockchain for internet-of-things or is there any mining algorithm that can be utilized in low-computational power devices preserving security? 2015-01-08T10:18:58.227

3 How does ShapeShift operate on 0-1 confirmations 2015-01-08T15:34:09.143

3 What can a dishonest node do (or try to do)? 2015-05-26T20:58:53.377

3 Why it is not possible for a payee to verify double-spends of the coin? 2015-08-22T04:40:55.903

3 When are multiple transactions spending the same output in the same block considered a double spend? 2015-09-09T08:09:09.757

3 What incentive is there for a miner to not cancel his own 'real' txs 2016-06-26T06:59:48.310

3 NBitcoin - how to set RBF to true in order to give higher fee for transaction 2016-11-24T11:02:34.990

3 What if a pair of double-spent transactions are collected into a new block? 2017-01-08T00:30:02.673

3 How does SPV prevent double spending of UTXO? 2017-05-08T17:30:59.440

3 How does a double spend get resolved when two miners find conflicting blocks at the same time? 2017-06-21T02:10:27.843

3 Is there a visualisation tool for discarded block chains in Bitcoin? 2017-06-24T21:16:16.947

3 Why we need mining? 2018-06-15T10:23:17.343

3 Regarding CVE-2018-17144 and test cases 2018-09-21T08:02:48.293

3 reproduce CVE-2018-17144 (inflation bug) on regtest for learning 2019-01-27T10:02:36.603

3 Does proof-of-work contribute directly to prevent double-spending? 2019-08-04T02:36:20.040

3 Single tx included in two different blocks 2019-09-26T08:18:20.483

3 Handling "dead" (double-spent) transactions in my mempool 2020-03-26T01:42:41.033

3 Which transaction would get confirmed in an uncongested network? 2020-07-26T04:50:48.547

2 My wallet won't load because it says it contained a duplicate transaction. Are my coins lost forever or can i load it some other way? 2012-07-11T19:07:57.167

2 Is there a risk of double-spending when making a face-to-face transaction? 2013-03-21T19:11:22.313

2 Can Ripple Unique Node Lists (of validators) be weighted? 2013-03-31T20:20:09.780

2 Is it possible to execute a double-spending attack in Ripple during a network split? 2013-04-26T05:28:34.567

2 How often do double spends happen successfully? 2013-08-22T14:00:10.973

2 How are Bitcoin ATMs secured against double-spends? 2013-12-18T22:08:42.950

2 How strong is the bitcoin network? 2013-12-26T07:21:15.550

2 How much money is a double spend worth? 2014-03-04T16:52:46.903

2 Double spending race attack first transaction 2014-05-09T19:39:32.427

2 Can Bitcoin scripting be used for double spending attacks? 2014-05-15T11:51:34.167

2 Can too big hosted mining service be mitigated by allowing customers to choose mining pool? 2014-05-27T15:18:23.203

2 What's the easiest way to someone to double-spend 0-confirmation transactions? 2014-11-05T04:28:42.550

2 Is it possible to use Selfish Mining to steal bitcoins? 2015-04-29T09:37:28.963

2 How many confirmation do i have to wait before i can spend the inputs I already received? 2015-06-02T13:24:15.583

2 What would you do while a hard fork lasts? 2015-07-31T19:16:35.317

2 Can a malicious majority miner rewrite history? 2015-10-14T10:42:27.890

2 double spending 2015-11-27T10:57:04.407