3 How many nodes is too many? 2019-06-10T01:42:18.640

3 To what extent does asymmetric cryptography secure bitcoin transactions? 2019-07-20T08:25:47.237

3 What are the potential security issues when running a Lightning Node on my home network? 2019-07-23T13:27:49.213

3 Why is no security lost by using 32-byte public keys in Schnorr signatures instead of 33? 2019-08-30T21:32:34.650

3 Why can't a longer key combat quantum computers? 2019-10-24T08:02:09.280

2 Is bitcoin subjected to DOS attack? 2011-12-12T16:52:31.250

2 How would one inject a blockchain fork to the Bitcoin network? 2012-02-27T13:20:17.040

2 How could the protocol or client be altered to mitigate a timejacking attack? 2012-03-04T01:46:24.097

2 How do mining pools protect their wallets? 2012-05-11T00:01:04.823

2 What are the most notable cases of coins or wallet thefts? 2012-05-11T23:07:59.803

2 What user data has been leaked from MtGox's database during June 2011 hack? 2012-05-24T14:37:30.373

2 Is anyone working on / has implemented a "two-factor paper wallet"? 2012-08-02T05:49:30.953

2 Is there a way to import a private key already protected with the passphrase? 2012-09-10T22:13:39.750

2 Should a JSON-RPC user be required to use a password when backing up the wallet? 2012-12-16T01:46:38.933

2 Where can I look to see a revealed public key? 2013-03-07T02:08:52.137

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

2 Is Google Authenticator really useful on blockchain.info? 2013-04-11T12:56:57.513

2 Is there any risk associated with using the same passphrase on two different wallets both hosted on blockchain.info? 2013-04-11T12:59:06.847

2 How long does it take to go from 51% hash power to 100% hash power? 2013-04-19T14:20:09.973

2 Integrity of ensuring the correct recipient of a BTC public address? 2013-05-17T14:15:35.463

2 Is there any study or research of how to make BTC transfers refundable? 2013-07-10T15:55:00.447

2 Is the keypool erased when changing wallet password? 2013-07-31T21:26:50.547

2 What is the probability of generating 6 sequential blocks, less than an hour? 2013-09-03T22:48:08.847

2 How does the architecture prevent someone taking over by running a several billion clients? 2013-10-23T10:50:02.267

2 Has the payment protocol – which is supposed to protect against Man-In-The-Middle attacks – ever been implemented? 2013-11-05T14:45:03.753

2 Why does using a wallet in cold storage make it less secure? 2013-11-09T04:55:45.620

2 MultiBit Password Protection - How Secure is it? 2013-11-12T02:37:45.700

2 What is the most efficient and safest way to handle cold&warm Bitcoin storages? 2013-11-16T09:49:55.793

2 What are the differences in these methods of creating wallets offline? 2013-11-16T11:52:58.640

2 Is declining number of peers (hosts) threatening the network? 2013-11-18T15:22:14.430

2 How does the Bitcoin Standard Client wallet encryption work? 2013-11-20T00:50:59.073

2 Hashrate required for Finney attack on SatoshiDICE 2013-11-24T21:37:00.897

2 Is a 51% attack really expensive? 2013-12-01T11:44:56.963

2 When is a Bitcoin Adress considered even and when odd? 2013-12-03T20:56:18.737

2 Can bitcoin transaction be signed offline without access to blockchain 2013-12-04T20:42:09.477

2 "Instantaneous" transaction verification? 2013-12-13T20:48:36.877

2 Have any security vendors developed any Bitcoin Cross Domain Solutions (CDS) implementions yet? 2013-12-22T17:52:44.440

2 Any need for coinbase field in coinbase transaction? 2014-01-27T14:03:51.710

2 How would you store a bitcoin wallet for a small bitcoin exchange? 2014-02-11T01:50:59.667

2 What trust am I placing where when I use Electrum? 2014-02-15T17:20:15.240

2 History of cold boot attacks on Proof-of-Stake miners 2014-02-16T15:35:24.180

2 At what point does the criminal get caught? 2014-02-18T21:32:36.803

2 mtgox failure... any implications for bitcoin/ecurrency protocol design? 2014-03-06T17:10:18.147

2 Who can see my IP address while using Electrum 2014-03-14T16:40:09.283

2 Bitcoin security, what is wrong with my thinking? 2014-07-02T15:14:48.143

2 How to securly move bitcoins from a wallet.dat file to a paper wallet? 2014-08-16T15:01:29.470

2 How secure is calling bitcoind JSON-RPC from same computer? 2014-09-13T18:34:05.413

2 Can a Trezor seed be used in any other HD wallet? 2014-10-16T09:14:17.570

2 How does a Trezor passphrase prevent restoration of a wallet if an attacker knows the seed? 2014-10-17T14:24:52.670

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

2 ECDSA x,y coordinate validity verification doesn't seem to work 2014-11-20T10:47:39.887

2 How resilient are Proof of Stake (PoS) mechanisms to brute force quantum computing attacks? 2014-12-28T03:16:15.393

2 Can an exchange work which does not have control of the private keys? 2015-01-24T03:14:05.453

2 Can an attacker create many nodes that approve blocks without work? 2015-01-27T10:49:50.497

2 What is the waste ratio of the overall network? 2015-06-09T01:08:01.683

2 Duplicate r value for an address: only an issue for a multi-input Tx? 2015-06-28T11:50:28.467

2 BIP 38 Implementions for Altcoins? 2015-09-17T01:25:37.170

2 getnewaddress (RPC) on encrypted bitcoin wallet without wallet password? 2015-10-02T10:48:39.763

2 Could someone solve for your private keys by sending many transactions to the same address? 2015-11-22T15:25:11.870

2 Can google steal my Bitcoins if I store the private key in Google Keep note 2015-12-05T00:35:19.230

2 Is it safe to authorize Coinbase to withdraw cash directly from my bank account? 2015-12-31T04:44:47.277

2 Can we make Sybil attacks virtually impossible? 2016-01-05T18:31:50.453

2 Should you be able to insure Bitcoin the way banks insure bank accounts? 2016-01-28T02:29:22.507

2 can man in the middle change transaction before its broadcast? 2016-05-02T16:29:06.967

2 Does the private key have special mathematical properties? 2016-05-19T14:59:42.290

2 How multi-signature wallets comunicate with each other? 2016-05-27T20:06:27.663

2 Why DARPA wants blockchain based secure messaging system 2016-06-22T15:24:13.057

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

2 Why is it important that miners mine at the end of the longest branch? 2017-03-24T10:35:53.417

2 Is the reference client of Bitcoin regularly audited? 2017-05-23T15:46:19.200

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

2 How is the human end of the Bitcoin network secured? 2017-06-27T05:17:21.857

2 Is it possible to use the same BIP39 list of seed words to create addresses for different crypto assets? 2017-06-27T11:28:51.993

2 Are the mining incentives of bitcoin compatible with the existence of a competing Proof-of-Work chain? 2017-07-04T14:20:12.943

2 How can I create an exchange in a foreign country? 2017-07-06T01:23:36.077

2 If you had the resources of a Nation-State, could you invalidate Bitcoin chain? 2017-07-20T17:12:00.170

2 Having an address without a wallet 2017-08-25T09:38:55.783

2 If someone knows my bitcoin address, does this mean they can spend it or move it? 2017-09-01T21:32:45.867

2 Segwit2x/btc1 block header changes: wipeout protection for SPV nodes? 2017-10-06T15:03:44.860

2 How to keep my bitcoin safe when I move my bcash? 2017-10-09T07:42:18.633

2 What can an attacker who controls majority or all of the full nodes do? 2017-10-25T14:10:44.400

2 How to open new wallet into Bitcoin Core and switch between? 2017-11-01T06:42:39.463

2 Why is it safer to keep your bitcoins offline than online on Coinbase? 2017-11-13T13:27:45.560

2 Safely generating Bitcoin paper wallets 2017-11-27T18:20:00.940

2 How to verify the Bitcoin core software? 2017-12-03T05:52:54.690

2 Are received BTCs really mine? 2017-12-08T07:35:35.107

2 Is it wrong to spend Bitcoin from someone else's wallet if my Bitcoin client generates the same address? 2018-01-18T17:21:00.417

2 Lightning network hub security? 2018-03-20T22:10:22.557

2 Checking the first and last characters of a cryptocurrency address? 2018-06-25T19:24:02.267

2 Do lightweight wallets validate signatures? If not, why? 2018-07-13T17:18:15.223

2 Is there a limit to how many blocks can be rolled back from a 51% attack? 2018-07-29T22:52:52.573

2 Can I, and should I, verify bitcoin core source code before compiling it? 2018-10-07T07:20:55.350

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 Are lightweight LN wallets vulnerable to transaction withholding? 2019-03-24T10:24:00.170

2 Malicious full nodes causing denial of service attacks 2019-04-07T18:36:45.037

2 How much of the Bitcoin Source code is untouchable? [CVE-2018–17144] 2019-05-07T17:28:19.873

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

2 Does assumevalid lower the security of Bitcoin? 2019-06-26T09:32:04.497