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Questions tagged [encryption]

Encryption is the process of encoding information into a ciphertext that only authorized parties can decode. Encryption isn't used in the Bitcoin protocol itself, however it can be used e.g. for encrypting wallet backups or peer-to-peer communications.

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Nosey/disgruntled employees at my VPS company

How can I take steps to prevent/detect bad employees stealing my money? I'm running bitcoind on a VPS with Ubuntu 14.04. Only ports open are 22, 80 and 443. I have fail2ban and auditd enabled. ...
Eamorr's user avatar
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How can I recover bitcoin core wallet after encryption with password?

I have backup of wallet.dat file before I encrypted it with password. I also do know the password. I deleted my server and all thing has gone but I have back up of wallet.dat file in computer. I send ...
Xavier Uncle's user avatar
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severity of bitcoin vulnerability to AES crack

In the event that AES is cracked, what are the implications for the consensus layer of bitcoin? What are the implications for user's bitcoin wallets? On average, how many bitcoin would be available to ...
hedgedandlevered's user avatar
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Why does the Bitcoin network encrypt the transaction data? [duplicate]

The whole process of encryption sounds useless to me. Miners/validators and full nodes need to verify each transaction. They need two pieces of information: The original transaction data The ...
Curious George 's user avatar
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For mobile wallets that don't ask for a password, how are keys encrypted on your device?

I've used wallets that give a seed phrase, but don't ask for a password to send coins (signing a transaction). I can't imagine they encrypt with the seed phrase since you don't ever re-enter the seed ...
drdo's user avatar
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1 answer
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Is my cold wallet still cold?

I created a new wallet.dat on a dedicated, secured machine with Bitcoin Core. Then I encrypted it. Then I sent my "fortune" of coins to it. Then I backed the file up by putting it on all my ...
T Kalpakoff's user avatar
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1 answer
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BTC Treasure hunt

Alright, I’m new to Bitcoin/Crypto, and this might be a long story but worth it. My life long friend had a $50 Visa gift card back in 2009-2011. His friends were over the house one day and mentioned ...
whoiszo's user avatar
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Is it possible to run HD derivation with an encrypted master node or seed?

Given either a seed or the private part of a master node, that is encrypted using AES-256-CBC (or another secured symmetrical cypher) with key K, is it possible to run derivation such as described in ...
Kyll's user avatar
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Is the Mycelium HD wallet private key stored encrypted on the device?

haven't found details on that in the net. My concern is that I'm using a corporate (bring you own device) phone. We have to install a "security" app running with administrator rights. IMHO this app ...
Romeo Kienzler's user avatar
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Could BitCoin network be destroyed if blockchain would get corrupted?

This thought came to me whilst watching mr. Robot where the entire database of a financial corporation has been encrypted. Would that (in theory) be possible if a virus was spread that would target ...
Ivan Venediktov's user avatar
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Solving a Block with more than one miner connected to same daemon

Well excuse me in advance if my question sounds funny. But I'm just curious perhaps someone can shed a light. When in a pool of miners, let's say there are 100 miners connected to a single daemon ...
GoodtheBest's user avatar
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How are transactions verified by nodes other than the initial receiver?

If I understand correctly, when I create a new transaction from my wallet, I have to sign it and encrypt it. My wallet encrypts the message using the public key of the node it is connected to, so it ...
daniel sp's user avatar
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Changing wallet password using double quotation marks turn out to be mysterious (Qtum Core)

I installed Qtum core in my Ubuntu 16.04 server and generated my wallet, and encrypted it. For the test purpose, I changed the password using the command like below. I typed below command to change ...
JayB Kim's user avatar
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1 answer
538 views

Two identical transactions and hashes in Block Hashing algorithm

As I was reading Bitcoin hashing algorithm, I see that a Block Header contains hashes in the form of fields like hashPrevBlock , hashMerkleRoot . I have following questions: 1) Are the transactions ...
John's user avatar
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Old encrypted wallet + bitcoin core

I got desperate, I tried all the instructions I could find on the Internet - nothing helps. What I have: wallet.dat from bitcoin-core encrypted from 2015 (in four different places) the password I ...
LamoSS's user avatar
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1 answer
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Access restored but encrypted/locked old wallet (2013 version)

I Installed Bitcoin Core v25.0.0 and restored my old wallet backup made in 2014 (with bitcoin core version of 2013) successfully. The wallet is shown, status is encrypted and locked. Trying to unlock ...
Leo's user avatar
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If I solved y²= (x³ * ax * b) mod p [as it is] what would I gain or be able to do with it's algorithm?

So the calculations for secp256k1 affirm to the formula y² = (x³ * ax * b) mod p of which is said to be impossible to calculate (as is) because of arbitrary large numbers involved. Hypothetically if ...
AncientTides's user avatar
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1 answer
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wallet seem to be encrypted or corrupt

I found my wallet but i cannot access it tryed with bitcoin core. But gives error i think i encrypted or corrupted file. I openend with WinHex but only see 2020 in it.try to find hash but no succes. i ...
Eddy's user avatar
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1 answer
262 views

How to get information from electrum wallet?

I have my wallet file and it is encrypted with a password. How to decrypt wallet file using code? Encryption seems similar to Fernet.
Maxim Bogush's user avatar
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1 answer
758 views

What is the electrum bitcoin wallet password encryption method?

What method does Electrum bitcoin wallet use for password encryption? I want to check to see if the file encrypted with the password is secure. And what are the ways around to decrypt it outside the ...
Monero's user avatar
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1 answer
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Addresses found in wallet.dat that start 00 14

I found a list of addresses in my dumped wallet.dat file that all start 00 14... They are script=1. What are these encoded with and how to decode?
burchbit's user avatar
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1 answer
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Bitcoin Signatures are susceptible to quantum attacks - how exactly and with what practical impact? [duplicate]

@PieterWuille wrote in another thread: "" The hashing algorithm is probably the most quantum-resistant piece of cryptography right now in Bitcoin. Barring any specific breaks, SHA256 and RIPEMD160 ...
johnsmiththelird's user avatar
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1 answer
194 views

can I Re- encryp my wallet with a wallet.dat file from before encryption

My computer crashed and I lost access to my bitcoin wallet.. before that happened I knew I had lost my passphrase so when trying to recover my wallet with my wallet.dat I looked for a very early dated ...
Fran's user avatar
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1 answer
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Unconfirmed bitcoin transaction (Need help) [duplicate]

I have sent bitcoin since 25th May 2017 till now the transaction haven't confirmed yet. https://blockchain.info/tx/ac0635c98af0703927f1b364d2d8c19f4b2812c97169c729cb341111adcea866 How can i do? Please ...
Tickbit's user avatar
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58 views

At what market cap will bitcoin be worth "cracking"?

This is the doomsday scenario: bitcoin's market cap goes into the trillions of dollars and the cost/benefit ratio of cracking the encryption algorithm tips so that it becomes attractive to throw ...
Tom Russell's user avatar
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0 answers
333 views

How can an encrypted wallet spend coins without asking for decryption password?

It is possible for some encrypted wallet to spend coins (e.g. this one) without requesting a decryption password or any other form a authentication. Of course, a password is requested when first ...
Sven Williamson's user avatar
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0 answers
21 views

How to set Dogecoin Wallet Encryption? [duplicate]

Should I make a Dogecoin wallet addresses encryption? If yes, what are the pros and cons and how it is made on linux - Ubuntu 13.10?
gotqn's user avatar
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-1 votes
2 answers
85 views

Bitcoin core wallet backup corrupted by an external tool [closed]

Do you know if my wallet.dat which has become wallet.axx due to incorrect handling of an external program (I do not know the name of the program, but it is used to encrypt Windows files) has the ...
Dydy94's user avatar
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