32 Why are hashes in the bitcoin protocol typically computed twice (double computed)? 2013-01-07T03:54:49.427

27 Why are Bitcoin addresses hashes of public keys? 2012-05-08T15:06:51.780

22 Is bitcoin mining itself compromising the security of SHA256 2013-11-23T08:57:22.577

17 How do you perform double-SHA-256 encoding? 2012-12-08T22:53:51.103

17 How can I convert a SHA256 hash into a Bitcoin base58 private key? 2013-03-09T02:51:46.863

11 Where is Double hashing performed in Bitcoin? 2013-03-17T16:42:28.380

11 Won't ASIC miners eventually break SHA-256 encryption? 2015-12-14T03:11:00.743

10 Did Satoshi intend to allow midstate computation to speed up hashing? 2015-03-27T05:05:21.507

8 If SHA256 were compromised tomorrow, would Bitcoin collapse, or is there some contingency plan to move the network to a new hashing algorithm? 2013-11-03T08:40:45.963

8 How to generate a Bitcoin Private Key Checksum 2017-03-08T19:07:37.060

7 Can an SHA256 hash be used as an ECDSA private key? 2012-05-09T15:09:56.730

7 How does a miner perform hashing? 2012-10-19T21:24:36.513

7 If SHA256 and/or RIPEMD-160 were broken, would all bitcoin addresses be compromised? 2013-03-26T00:07:14.160

6 How do I calculate the txid of this raw transaction? 2014-11-28T15:56:50.467

6 Does every nonce really have an equal chance of winning? 2015-03-11T20:53:08.963

5 Where can I see an input that will hash to a solution? 2012-06-13T19:50:50.630

5 bitcoins can use different algorithm, how and implications 2013-05-01T23:13:02.327

5 How many hashes create one Bitcoin? 2013-07-06T09:27:36.257

5 Why was the RIPEMD-160 hash algorithms chosen before SHA-1? 2013-11-11T01:37:17.903

5 Can the bitcoin network hashrate be used for a 51% attack on other coins? 2014-02-17T06:21:22.647

5 Are Bitcoin ASICs Optimized for Fixed Length Messages? 2015-01-09T17:53:15.823

5 Visualize Bitcoin Hashing 2015-05-08T15:25:40.323

5 Is this how I should calculate a Double SHA256 2017-03-08T12:44:15.553

5 Is Bitcoin PoW actually SHA256 + Merkle generation? Or have I misunderstood coinbase/append? 2019-07-21T04:35:04.667

4 Can Artificial Intelligence be used to mine BitCoins faster? 2012-10-01T01:12:56.147

4 What determines SHA256 performance on different types of hardware? 2013-04-15T20:17:23.553

4 SHA256 Implementation Gate Equivalent 2013-08-01T18:22:45.770

4 Using ASIC for password cracking - mad concept? 2013-11-09T18:14:51.627

4 What is the point of comparing sha256 of downloaded file with published on the same website code? 2014-04-11T04:46:04.753

4 What is a midstate? How does using a midstate speed up hashing? 2015-03-23T07:14:53.333

4 Theoretical minimum # of logic operations to perform double iterated SHA256? 2015-04-18T22:54:35.683

4 Which is the smallest hash that has ever been hashed? 2017-12-16T19:52:58.207

4 What are the 3 arguments called in function SHA256? 2019-05-31T08:35:59.017

3 Is there a guaranteed hash for every block? 2012-05-04T22:01:15.677

3 How long would it take to crack an 8-word brain wallet? 2013-04-10T05:06:44.177

3 What values are hashed in the SHA-256 algorithm, and what would be the next iteration until a possible header is found? 2013-11-12T20:45:06.583

3 Can ASIC miners easily be used to guess brainwallet passphrases? 2014-04-10T09:30:25.397

3 Are Bitcoin Block Hashes Predictable 2014-04-18T18:07:24.470

3 SHA256 * 2 on header - what am I doing wrong? 2014-05-14T02:10:59.830

3 Given a block, is there a list of all hashes for all possible 2^32 nonce values? 2015-01-21T17:21:15.893

3 Why is the block header 80 bytes, not 128 bytes (= two SHA-256 blocks)? 2015-06-14T00:46:32.617

3 Using a Bitcoin or Litecoin miner for attacking PBKDF2 / SHA-256 2015-09-16T13:31:36.517

3 Mining for nil-transaction blocks only - gaming the incentive scheme by rogue miners / consortium? 2015-11-16T15:58:29.703

3 Is it computationally feasible to find two transaction IDs with the same first 20 bytes? 2015-12-21T15:50:37.373

3 How to generate bitcoin address? 2016-03-15T00:54:46.463

3 Is the SHA256 value in the bitcoin address wiki accurate? 2016-03-31T02:23:40.837

3 Private Brain Key Generation and Public Address Not Matching Java 2016-04-24T01:04:12.030

3 If SHA256 produces an alphanumeric hash, how can a hash be "less than a certain value"? 2016-07-16T22:24:21.973

3 How to calculate the BIP34Hash? 2017-06-07T10:46:45.123

3 Understanding what is being run through Sha256 2018-01-04T23:26:17.150

3 Checking the Merkle Root for Block #100000 2018-01-05T22:06:58.847

3 What is the reasoning behind the choice of 2^256-2^32-977 for the prime on the secp256k1 curve? 2019-03-17T23:35:01.987

3 Get a correct SHA256 of a PublicKey as bytes 2019-10-25T15:33:24.867

2 test cases for hash algorithm anywhere? 2013-05-20T20:15:04.153

2 What is the fastest public SHA256^2 code for x86? 2013-06-23T18:24:00.793

2 Cheating ASICs and Mining Software 2013-11-29T05:06:43.850

2 Why don't any of the SHA-256 vulnerabilities matter for mining? 2014-11-12T05:34:01.143

2 Mining , hash and Nonce 2015-10-06T10:48:56.957

2 Correct way to convert a 256-bit private key to WIF? 2016-05-22T19:36:12.253

2 How to compute double sha256 shown in examples of bip 143? 2017-01-05T23:12:27.233

2 Fastest device to perform single-threaded SHA256 hashing 2017-01-13T20:09:47.577

2 Double Hashing Merkle Trees 2017-07-23T14:33:26.667

2 How can I check the hash of a bitcoin block? 2017-12-16T11:12:06.683

2 Convert between String/Hex/Byte in Java for sha256 - wrong format? 2017-12-29T21:09:01.090

2 Do pools distribute "jobs" to miners based on "failed" solutions which have already been submitted? 2018-12-08T19:33:24.347

2 How to make a homomorphic preimage/payment hash with current lightning network / Bitcoin implementations? 2019-04-24T10:05:41.373

2 How does Bitcoin utilize cryptography and secure hash algorithm (SHA) to link records in the blockchain? 2019-11-01T10:29:36.507

1 How to work out my hardware's hashrate power 2013-12-14T10:51:27.040

1 How is the solution hash in a block generated? 2013-12-27T21:04:21.973

1 Bitcoin Address generation 2013-12-30T13:18:27.003

1 In a perfect world, should RIPE160 be used as the block ID or transaction ID? 2014-02-18T16:39:41.493

1 Does Bitcoin's SHA256 proof make a 51% attack more likely? 2014-03-17T17:29:49.187

1 What parts of SHA-256 hashing an ASIC miner really does, and what remains a CPU job? 2017-08-12T14:43:14.963

1 if a Bitcoin mining nounce is just 32 bits long how come is it increasingly difficult to find the winning hash? 2017-08-31T11:00:27.287

1 What does cloud instance owned means? 2018-01-04T02:47:17.137

1 Why do we inverse the hash of the blockheader? 2018-01-07T14:43:34.280

1 Can you use a mining hardware to find a string for a certian hash 2018-06-16T06:13:22.863

1 Creating a Bitcoin address using the 9 steps. Stuck on stage 2 2018-07-04T15:52:30.953

1 Electrum's "script hash" form with NBitcoin? 2019-01-13T17:31:39.143

0 Solving a block and verification of transactions 2013-05-13T05:17:22.213

0 Besides mining Bitcoin what is another good use for an Antminer S1? 2014-08-15T04:48:52.693

0 How do you hash data for mining? 2017-01-15T18:14:23.873

0 How long does it take to perform a single SHA256? 2017-03-05T14:11:35.430

0 How to check two hashes are equal using block data and the nonce? 2017-07-11T18:06:15.933

0 New params of chainparams.cpp. What put on them and how generate? 2017-07-26T03:03:58.633

0 Converting a bitcoin miner for other use 2017-08-04T00:50:12.677

0 btc mining, the largest supercomuter in existence? 2017-08-15T14:54:57.927

0 Understanding the Hash Function 2018-01-05T01:49:14.343

0 Bitcoin hash calculation 2018-01-15T00:16:40.307

0 Attacking Blochcain/Bitcoin by hash 2018-01-22T18:23:09.967

0 Difference between scrypt and sha-256 mining? 2018-01-26T09:10:22.120

0 retail hardware SHA256d hash rates 2018-02-02T02:36:53.727

0 How do you generate a receive address from a string? 2018-02-09T05:45:36.160

0 How important is the hash power in solving a block? 2018-02-11T22:39:24.257

0 Is pre-image attack useful for mining? 2018-03-26T09:56:08.387

0 How do I double SHA-256 the header of block #59,500? 2018-06-07T03:18:07.243

0 How easily can asics be ported over to other sha algorithms? 2018-06-19T10:59:26.600

0 How to Build Block Header in stratum? 2018-07-13T08:14:09.980

0 How would you find the Merkle Root with a Block that contains 6 transactions? 2018-07-15T15:50:51.137