3 How safe is bitcoin with regard to a random address generation attack? 2014-12-17T03:38:39.520

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 About performing SHA-256 hashing on the public key 2015-04-06T20:36:10.760

3 Compute TxID of Bitcoin Transaction 2015-09-03T01:31:40.733

3 In Proof-of-Stake, can a block creator fudge the block hash? 2015-10-12T05:03:51.147

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

3 Why change the nonce instead of just rehashing? 2016-02-21T15:19:42.647

3 Verifying a bitcoin trx on the Unix cmd line with OpenSSL? 2016-07-10T10:51:37.380

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

3 What can be changed in signed bitcoin transaction? 2017-02-28T11:57:09.397

3 When mining, does one also include Merkle root data into block header when testing for hashes? 2017-03-26T17:31:58.887

3 Why does the hash-rate change so drastically? 2017-06-05T12:44:49.240

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

3 Verifying a P2SH transaction script by hand. How should I concatenate OP CODES in order to hash the script? 2017-07-28T05:45:37.583

3 Why is difficulty measured in a hash’s leading zeroes? 2017-08-09T03:46:34.053

3 What if is there is no solution to a block? 2017-10-22T18:04:20.093

3 Verifying that a transaction is in the blockchain 2017-12-14T06:15:50.280

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 Why max target is not (2^256 - 1)? 2018-01-06T20:52:38.950

3 Why you need to rehash each block after a changed block when changing data in a blockchain? 2018-01-21T18:47:17.467

3 Checksum vs. Hash: Differences and Similarities ? 2018-09-23T10:37:10.233

3 Longest unconfirmed transaction? 2019-10-22T00:15:54.957

2 How do the clients agree on the target to hash for? 2011-09-23T11:51:18.100

2 What makes difficulty more difficult? 2012-12-05T08:20:13.380

2 attempting to decipher a cgminer share.log 2013-05-05T21:53:29.470

2 Sample worked Stratum example 2013-05-29T10:58:25.070

2 What is a "share rate"? 2013-11-05T16:07:57.953

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

2 Are any hashes (Tx or block) actually stored in the blockchain? 2013-12-04T18:59:02.633

2 Why is a double hash of the previous transaction included in Txin? 2014-01-01T07:32:06.147

2 Does a miner (or mining pool) who has 10x as much hashing power have 10x the odds of mining a block? 2014-02-10T02:32:41.493

2 BFGminer can't find my NanoFury on Raspberry Pi 2014-03-25T02:48:35.820

2 What is the average number of hashes it takes to mine bitcoins? 2014-04-16T20:39:56.797

2 How does a proof of work limit of `~uint256(0) >> 20` translate into a difficulty of `1 / 2^12`? 2014-05-05T17:48:52.387

2 How is hash rate of mining hardware calculated 2014-06-30T16:33:41.603

2 Is it possible to convert Bitcoin Miner to Litecoin Miner? 2014-09-13T10:28:46.887

2 bitcoin address to Hash 160 public key : not consistantly reversible? 2015-07-15T08:01:56.457

2 Where is the spec of HashCash so that I can implement it in Java from scratch? 2015-09-03T12:39:44.087

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

2 Why is this transaction stuck? 2015-11-06T07:34:10.760

2 Why was finding a hash beginning with a certain number of zeroes chosen as the proof of work? 2015-11-14T21:40:42.850

2 What exactly is the input for the Hash pointer in block k+1? 2015-12-02T11:43:16.380

2 Whats the public key required for in a transaction? 2016-01-28T20:37:59.600

2 Can't find correct z1 & z2 for transaction 2016-05-09T05:18:54.823

2 How is the extra nonce formatted? 2016-09-12T16:40:29.120

2 Why check for multiple nonces despite finding a golden nonce? 2017-07-12T07:02:26.457

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

2 API for getting the Hash-of-thing-to-sign 2017-07-25T00:11:51.723

2 Any source for a visualized SHA-2? 2017-08-04T14:21:07.820

2 How to tell which part of the previous tx I need to make the hash to sign for an old given tx? 2017-08-09T21:59:22.170

2 How to produce a Hash160 bitcoin address? 2017-09-20T20:04:54.217

2 How can blockchain.info show the output address of a transaction when the output address has never been used in any other transaction? 2017-10-01T11:34:38.213

2 Can I restore a Litecoin wallet with Public / Secret? 2017-10-02T04:17:47.977

2 Why is HMAC-SHA512 used on root the root seed to create master private key and chain code in HD wallets? 2017-10-27T02:23:59.203

2 Total number of hashes performed for bitcoin purposes? 2017-10-27T16:37:22.767

2 What causes quadratic hash problem? 2017-11-28T09:40:05.517

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

2 Why we must reference the entire txid for each output we want to spend? 2017-12-25T05:02:21.977

2 Blake-256 genesis block generation helpint 2017-12-28T03:12:12.933

2 Using the Merkle Root to prove the integrity of a block's transactions 2018-01-05T21:06:50.353

2 Probability of block rewards 2018-02-15T13:22:48.277

2 Generate private key from a bip-39 seed phrase? 2018-03-02T00:28:42.623

2 Is the hash of the coinbase transaction needed for the merkle root? 2018-03-02T08:28:13.797

2 What is Bitcoin's "genesis hash"? 2018-04-25T15:49:40.340

2 Is my understanding of Blockhain Endianness correct? 2018-05-10T20:36:25.030

2 API for multiple blockchains 2018-05-12T00:17:30.807

2 How do I concatenate two hashes in Python? 2018-07-08T01:13:11.367

2 When a node receives a transaction, what steps does it do to verify that transaction? 2018-08-05T05:51:42.960

2 How come Merkle tree is more efficient when tree branches are not stored in blockchain? 2018-09-14T18:49:25.610

2 Hashing Transactions for Mining 2019-02-01T19:58:58.137

2 Is this a collision attack or a 2nd-preimage attack? 2019-06-22T20:20:49.233

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

2 How can I find a hash with leading zeros 2019-11-21T20:53:42.010

1 How to use block and transaction hashes for generating simple stochastic chances? 2013-04-03T20:32:58.457

1 How to hash data from 'getblocktemplate' request 2013-09-19T02:50:47.477

1 Difference between coinbaseaux.flags vs. coinbasetxn.data? 2013-09-23T02:50:27.393

1 Construction of unowallet url 2013-10-06T13:11:42.697

1 Could there be an exploit by creating millions of meaningless transactions? 2013-12-08T03:18:49.783

1 Alternative Cloud Hashing sites to Cex.io 2013-12-12T16:22:50.743

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

1 Why are blocks hashed? 2013-12-18T17:50:31.627

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

1 Are transactions still tamper-proof if blocks are hashed without nonces? 2013-12-30T04:11:44.887

1 The bitcoin address space seems to be closer to 2^40, not 2^160 2013-12-31T06:09:54.467

1 When mining with 2 computers, do I need to use 2 separate wallets addresses? 2014-01-05T21:39:51.783

1 Block Hashing Data 2014-01-25T21:51:50.227

1 Would it be possible to have an ARM hashing based Cryptocurrency? 2014-02-23T01:38:36.683

1 Required number of bits in nonce 2014-03-13T14:42:49.560

1 How does Multi-Signature Pay 2 Script Hash (P2SH) enable stronger security? 2014-03-21T10:54:36.993

1 How accurate should pool estimation of hashing speed be? 2014-03-23T01:53:59.147

1 Why does the hash come before the signature? 2014-04-15T14:51:50.777

1 How to get bitcoin address from the pubkey_hash using bitcoin-abe or something else? 2014-07-15T15:10:28.353

1 Laymans guess to determine how many hashes must be computed to you find a specific value 2014-09-25T01:06:13.537

1 How do satoshidice's draws work? (HMAC hashes) 2014-10-15T14:01:43.687

1 API Authentication via Python 2014-10-23T05:44:10.680

1 How can I mine ALT SHA-256 coins using a Bitmain S4? 2014-10-29T16:02:45.093

1 two people with same PUBLIC address, how will people/network know how to deliver bitcoin 2014-11-05T00:48:15.723

1 How do I get hash to verify transaction? 2015-02-27T17:47:51.050