43 What happens if two miners mine the next block at the same time? 2013-03-06T10:43:37.373

36 Why can’t the genesis block coinbase be spent? 2013-04-20T00:24:27.607

28 What is proof-of-stake? 2013-04-03T21:30:42.827

22 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 term "Longest chain" mean? 2012-11-29T07:55:49.427

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

16 How does one mine Stellar 2015-04-23T13:08:07.510

15 What happens when a miner does not claim all fees/generated coins? 2012-08-28T00:34:19.087

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

11 How does Ethereum achieve consensus? 2015-09-04T13:37:10.107

9 Do "the official bitcoin developers" control Bitcoin? 2013-03-08T12:07:03.593

9 Why are banks and other centralized entities interested in block chains? 2016-05-13T02:25:06.257

9 Bitcoin without mining - what needs to be implemented 2016-05-27T09:22:39.210

9 How does Proof of Burn work? 2017-01-03T13:40:49.663

9 How is Bitcoin governed by mathematics? 2018-08-11T21:18:41.267

8 Is there a maximum size of a scriptSig/scriptPubKey? 2015-02-03T21:10:01.350

7 What is the exact consensus protocol Ripple uses? 2013-09-16T11:11:42.877

6 How does Ripple solve the sock-puppet problem during consensus? 2013-02-14T10:27:13.087

6 Why does Ripple's consensus process have a 80% threshold? 2013-04-25T23:11:44.547

6 What happens in an extreme case if Ripple fails to make a consensus? Will that part of the network be segmented off? 2014-03-18T02:05:55.293

6 What is the reason for using PoW in bitcoin? 2014-08-01T07:25:54.817

6 How does a new block get distributed 2016-09-08T10:31:57.193

6 Byzantine fault-tolerant consensus - Why 33% threshold 2017-08-30T12:31:31.397

6 Did the introduction of VerifyScript cause a backwards incompatible change to consensus? 2019-01-19T14:39:29.360

5 How is a blockchain split resolved? 2015-05-06T19:36:13.647

5 Why can malicious miners not award themselves with any number of bitcoins? 2016-06-26T17:38:59.370

5 What does 'signal' and 'lock-in' mean in a BIP? 2017-07-21T08:31:05.137

5 Why didn't Bitcoin implement segwit in the first place? 2018-10-27T23:37:28.640

4 What is the problem that mining solves? 2013-11-08T13:57:17.973

4 Ripple Distributed Consensus Algorithm 2014-05-12T09:51:26.693

4 Is Bitcoin a decentralized time-stamping authority? 2015-12-30T05:47:58.500

4 where is difficulty target inserted? 2016-10-17T19:17:04.300

4 How does Bitcoin avoid splitting into multiple p2p networks? 2016-12-09T22:40:16.683

4 IOTA Security with Tangle 2017-06-10T05:14:48.043

4 How does a miner get selected in Proof Of Stake? 2017-11-15T19:10:40.547

4 In what sense does the security model of proof-of-stake require users to "log on to the internet every few months" 2018-01-24T15:39:06.033

4 Has PoS really been proven secure under comparable assumptions as Bitcoin? 2018-07-19T10:07:05.603

4 Activation of SegWit v1 2019-03-02T20:35:27.437

3 Is there actual consensus on the blockchain's tip or only until the next block? 2016-02-15T11:27:55.233

3 Could a 2/3 majority vote be used as a consensus 2016-10-18T11:05:14.760

3 Can I rely on multisignature addresses being future proof? 2016-10-26T07:45:34.317

3 How was the 95% miner adoption threshold determined? 2016-10-26T09:45:08.933

3 Choosing between blocks with chain same work- why pick the first received? 2016-11-02T20:31:58.330

3 List of Bitcoin consensus rules? 2017-04-06T15:59:37.200

3 Why isn't 'classic' Multi-Paxos Byzantine Consensus used for public Blockchains? 2017-11-13T12:16:32.183

3 Why was BIP34 (Block v2, Height in Coinbase) not implemented via the coinbase tx's locktime or nSequence? 2018-06-06T12:38:17.957

3 PoW 51% attack vs. BFT 1/3 attack? 2018-07-26T04:58:49.340

3 What is "consensus"? 2019-08-13T16:27:57.740

3 Was it always required for the Coinbase transaction to be the first transaction in a block? 2019-11-14T15:47:28.963

2 Can a transaction be in two blocks? 2013-12-13T08:46:29.060

2 Why aren't Bitcoin transactions processed and verified by normal Bitcoin clients? 2014-02-24T05:13:01.803

2 Why does Ripple needs to have a long ledger? 2014-05-06T06:53:34.763

2 ripple consensus - mathematical certainty for all unl graphs? 2014-07-17T09:08:47.887

2 Ripple: only a sub-network reaching a consensus is largely enough to be decentralized&secure system? 2015-01-13T01:17:18.950

2 Dynamic coinbase as incentive to fill blocks 2015-06-22T15:36:59.083

2 how do nodes verify that a block has been solved and can be added to the blockchain 2015-12-17T23:58:24.193

2 Are the miners to decide if a consensus rule is accepted or not? Or are the buyers in power? 2016-05-18T07:45:21.717

2 Is transaction malleability the only consensus issue that needs fix to allow lightning network? 2016-08-24T16:48:44.647

2 What would be the implications of limiting Bitcoin transactions to fifty inputs? 2017-06-02T16:34:47.287

2 How security is managed in Cryptocurrencies with no mining possibility 2017-06-10T11:14:37.930

2 Why wouldn't miners change the protocol? (e.g. change difficulty) 2017-06-18T21:49:13.210

2 How do transaction fees exacerbate instability in Bitcoin in the future? 2017-07-26T18:42:30.273

2 Why are negative fees not allowed? 2017-09-04T15:18:57.527

2 Is segwit2x really called off? 2017-11-14T18:40:38.787

2 How will Ripple handle the 50,000+ advertised TPS? 2017-12-30T05:40:30.357

2 What is Delegated Proof of Stake (DPoS)? 2018-01-18T18:33:37.877

2 Why is a softfork unable to divide the network? 2018-05-25T05:32:41.210

2 Hyperledger consensus protocol 2018-05-26T20:25:43.277

2 What is the "main" difference between consensus mechanism of Bitcoin and Ethereum? 2018-08-10T11:38:01.960

2 Byzantine Fault Tolerance Threshold of Bitcoin: 1/2 or 1/3? (Edited) 2018-11-08T10:50:11.840

2 Exact definition of "Liveness" and "Safety" properties in a consensus? 2018-11-25T13:17:13.270

2 How does the 51 percent or 2/3 majority voting rule work? 2019-04-18T09:42:43.827

2 How to detect a consensus is BFT or not? 2019-07-04T11:05:31.630

2 Could a malicious attacker subvert the Bitcoin network by failing to create a block? 2019-10-06T17:16:38.967

1 Is mining the unfair part of bitcoin in the same way banks (or rather, fractionary reserve systems) are to current monetary system? 2013-01-27T12:27:26.993

1 What is the useful work done during the mining of Bitcoin? 2013-12-29T22:25:03.657

1 How can a Ripple contract use random values and reach consensus? 2014-02-14T22:28:33.503

1 What are the chances of someone coming up with a new and simple/out-of-the-box solution for the double-spending problem? 2015-09-04T08:09:42.957

1 why banks are trying consensus algorithms like ripple 2015-09-14T05:33:07.363

1 Understanding skip pointers in BlockIndex in bitcoin sources 2016-01-05T04:29:30.400

1 Why was the chain with the largest work chosen as the metric of consensus? 2016-06-16T20:30:09.343

1 Restarting mining on new transaction 2016-09-08T11:19:26.937

1 Setting minimal amount of nodes to reach consensus 2016-09-12T08:34:36.140

1 Does pruning affect a node's security or consensus ability? 2017-03-05T19:58:21.147

1 Would an optimization proof-of-work problem where the entity with the lowest hash wins have any security weakness or other disadvantage? 2017-05-26T21:27:37.317

1 How are code changes (e.g. new features) to applications such as Bitcoin deployed and how is compatibility mainted? 2017-06-09T11:30:39.110

1 Does the 1 MB block size limit include the header? 2017-06-09T21:33:51.680

1 Why is it so hard for alt clients to implement Bitcoin Core consensus rules? 2017-06-24T16:55:16.983

1 Is Tendermint proof-of-stake? 2017-08-03T07:36:27.487

1 how the FruitChains consensus works in bitcoin 2017-08-07T19:31:07.443

1 What this param in chainparams.cpp do? 2017-08-11T16:51:04.020

1 Who managed bitcoin and ethereum decision making? Who approves Bitcoin upgrades and forks? 2017-10-05T18:17:07.683

1 How a stakeholder is chosen randomly in proof-of-stake? 2017-10-27T15:58:15.747

1 Where is SIGHASH_TYPE serialized in SegWit? 2017-11-01T03:04:22.933

1 How do miners accept a hard fork 2017-11-07T15:37:43.783

1 Unbreakablecoin - Block Height Stopped Moving 2018-01-05T04:46:00.773

1 Difference between Byzantine Fault Tolerant Protocols and Byzantine Agreement protocol (i.e., BA*)? 2018-03-01T02:57:02.790

1 What consensus algorithm is MimbleWimble/Grin using? Does it use Zero Knowledge Proofs as well? 2018-03-06T11:19:04.840

1 What happens when a node cannot find the base Block of a newly received Block 2018-03-09T19:36:19.593