Questions tagged [encryption]

For questions relating to encryption operations and algorithms as they apply to crypto-currencies specifically.

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2
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2answers
33 views

How can I use messengers for crypto transactions?

Is it possible to use Signal or Telegram for crypto transactions? I heard CryptoCat messenger is for such needs, but interested in using those two mentioned above.
11
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4answers
18k views

Won't ASIC miners eventually break SHA-256 encryption?

I might be confused as to how Bitcoin works, but as far as I can tell, ASIC miners are getting better every year and faster at cracking SHA-256 encryption. Won't this cause the eventual complete ...
0
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0answers
31 views

Can't decrypt bitcoin core wallet, did I made a backup at the wrong time?

I am confused on why my bitcoin core wallet password would not work. I am 90% sure I tried the right password(s). wallet has many receiving addresses (10 000), I generated them with Linux from ...
0
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3answers
3k views

Seed for bitcoin-core qt

I have a bitcoin core -qt Wallet (on linux). Tell me, can I encrypt it? For example, there is the electrum wallet! It has words for deciphering. For example, i installed the electrum and the phrase ...
1
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1answer
18 views

How is the PRIVATE KEY actually created in the first place?

How is the "Private Key" created in the first place? I understand that once you have your wallet, you will also gain access to your public key and private key... But in order to have a wallet ...
2
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1answer
27 views

What happens when i change the encryption password of Bitcoin-Core wallet

What happens when i change the encryption password of Bitcoin-Core wallet? Is first pass lost forever , where is it saved - on the blockchain or on the wallet.dat file? What if encrypt wallet with ...
0
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2answers
180 views

Practical application of Electrum's Encrypt/Decrypt message feature?

It's pretty clear how signing a message with a Bitcoin key can be useful in proving ownership of funds. However, it's far from clear how encrypting a message with a Bitcoin key can do anything useful....
3
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1answer
96 views

Has Bitcoin Cores encryption wallet security ever been bypassable?

Every few years there seems to be an exploit found in Trezor that allows people to bypass the security. I was wondering has there every been the same case for Bitcoin Core wallet encryption?
1
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2answers
106 views

Encrypted message with nLockTime

I know you can delay a transaction's accepted date by using nLockTime. I'm still looking for the simplest way to generate a transaction with nLockTime, but that's another topic. I'm wondering if ...
0
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1answer
53 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 ...
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2answers
63 views

Why was noise XK fundamental pattern chosen in the transport layer (BOLT 08) of the lightning network

I am currently reviewing the transport layer of the Lightning network protocol. It builds on top of the noise protocol framework handshake patterns. What I don't get: Why was the fundamental pattern ...
2
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5answers
675 views

Encrypting wallet manually instead of using hardware wallet

i am new to this community and like to know why one should prefer a hardware wallet instead of using encryption algorithm like AES-256 along with PKDF2 to secure crypto wallets ? i currently hold btc ...
0
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1answer
52 views

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 ...
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0answers
46 views

How may bitcoins hash algorithm be secured in the future from quantum computing brute forcing?

Other threads already answer very clearly that quantum comps could easily "break" /attack bitcoins chain. Now: Are there any ideas among the bitcoin devs circulating out there, how to save bitcoin ...
0
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0answers
21 views

Does a Standardized Shamir Sharing protocol exist?

I've read Satoshi Labs SLIP 0039 github.com/satoshilabs/slips/blob/master/slip-0039.md But I can't find an implementation of this SLIP. Ian Colemans' tool(https://iancoleman.io/shamir/ is very easy ...
4
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4answers
368 views

How can I test and verify a vanity key before I send coins to it?

I ran vanitygen and oclvanitygen on the same machine, and realized after my run that both exe's share the same output file. I've had experience in the past where many programs append to the same TXT ...
0
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1answer
24 views

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 ...
2
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1answer
45 views

C-lightning Implementation password protect hsm while maintaing node access

I was wondering if there was a way to encrypt the folder that contains the hsm_secret (and a lot of other operational files necessary for constant operation of a C-lightning node) without cutting it ...
7
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5answers
2k views

BIP38 or Brain wallet?

I have seen many videos about paper wallets and different ways to store BTC. And I have choose to store using a cold wallet (paper wallet). But I am not sure what option I should choose: a normal ...
1
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1answer
42 views

Is the unencrypted copy of the wallet still usable after a copy is encrypted?

My wallet is not protected with a password, I have a few receiving addresses generated and a some funds in it, then I make a copy of the wallet and I set a password on this one. Will the old ...
0
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1answer
38 views

Is blockchain really secure to store sensitive data?

Plenty of developers these days trying to decentralise everything. I noticed some developers claim that they are gonna replace email with blockchain technology. johnmcafeeswiftmail, CryptaMail, ...
2
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1answer
76 views

I have a 100 character text message and I want to encrypt this message with my bitcoin “PUBLIC KEY” and decrypt it with my private key in Javascript

Are there any javascript libraries that can encrypt a 100 character text message using your bitcoin public key, but only be able to decrypt it with your bitcoin private key? I'm looking to create a ...
3
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1answer
53 views

Why bitcoind will shutdown after encryptwallet?

As mentioned in the bitcoin-cli document for encryptwallet command, bitcoin daemon will shut down after encrypting a new or unencrypted wallet. My question is about the reason for shutting the node ...
0
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2answers
226 views

Is encryption really needed for blockchain to work?

Is it right to say that Bitcoin and other blockchains do not use encryption? I read somewhere that blockchains rely on digital signatures and hash functions but not on encryption, and that encryption ...
0
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2answers
41 views

data confidentiality on blockchain

How does blockchain promise data confidentiality when the data is not encrypted? Or data confidentiality is not part of blockchain feature?
9
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3answers
2k views

How would one “Encrypt” a message using a Bitcoin *public key* and use its private key to decrypt it?

I have the following text string: This is a test message. Using my bitcoin public key (bitcoin address?), how can I encrypt this message? How would I decrypt the message using a bitcoin private key?
3
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3answers
3k views

How do Ledger Backups get stored?

Scenario Say you have configured a ledger wallet with 10 BTC and 10 ETH. You then lose this said wallet but you have the 24 unique words. You buy another ledger wallet enter the 24 words and BAM, ...
5
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2answers
4k views

Is this the proper way to use Bouncy Castle to generate a Bitcoin compatible key?

I'd like to use Bouncy Castle to generate the keypair for use with all *coin variants. Is this the correct implementation to get the correct ECC curve that the *coin variants use? Org....
0
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2answers
243 views

How does blockchain technology handle the actual transaction data?

My understanding of how a transaction is secured in blockchain, especially in bitcoin, is that the output of transaction data is locked to the recipient's address (a shorter version of his public key)....
0
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1answer
77 views

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 ...
3
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2answers
848 views

Multibit security with regards to “backup” folders

I'm using the MultiBit client to manage my wallet (right here on my computer), but I am concerned about the security with regards to the *-backup folders that it creates automatically. When I inspect ...
37
votes
7answers
49k views

How long would it take a large computer to crack a private key?

I am doing a presentation on Bitcoins and I was looking for some calculations to make people feel safe about the private key encryption. Please first answer, how long in bytes the private key is, ...
1
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1answer
4k views

Restore encrypted wallet

I need to restore a wallet created with bitcoin-qt which was encrypted. I have the encrypted wallet.dat file only. Do I restore this simply by replacing the current wallet.dat with my backup wallet....
0
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1answer
80 views

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 ...
0
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1answer
187 views

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 ...
2
votes
2answers
531 views

Using Bitcoin Core Wallet, encrypted it, now it won't recognize password

I typed in the password very carefully, the same 5 digit password I use on another program. I know and remember exactly what I typed, I didn't type anything incorrectly. I got an error message saying ...
2
votes
3answers
802 views

I never encrypted my wallet.

When I installed it I never encrypted it. I then funded the address and I now have 1.1 bitcoins. But when I tried to send or create a new address it asked for a passphrase. I tried every possible ...
0
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2answers
165 views

How can you sign a transaction without that signature being forged in the future?

So thinking here about an offline transaction. Both myself and the receiver sign it, and then at a later time that transaction is broadcast to the network in the block. What is stopping me from ...
1
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2answers
108 views

How does Electrum protect my Seed?

I was reviewing how Electrum wallet protect my seed. They say this regarding seed protection: Your seed and private keys are encrypted using AES-256-CBC. Source: http://docs.electrum.org/en/...
0
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1answer
54 views

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 ...
4
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1answer
1k views

How can a deterministic wallet have one private key but multiple public keys

If we take for example bread wallet. There is one mnemonic to remember, which means one private key? But when you use the app, your public address constantly changes. So more than one public key? ...
3
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2answers
2k views

Is this how to generate a bitcoin address with python?

So I have already the public key. My question is if I'm applying correctly the b58 encoding, since bitcoin uses b58check, and also adds x00 prefix. Can somebody explain me that? Thanks. import ...
8
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2answers
8k views

Backing up my bitcoin wallet - is wallet.dat all I care about?

I know that there are many duplicates of this but I'm hoping that the way in which I word this explains and helps not just me, but others as well. In any of the coin wallet bitcoin and the alt coins,...
2
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1answer
4k views

How can I fix corrupted encrypted wallet.dat?

My only one backup of encrypted wallet is corrupted (last time when backed it up i probably didn't shutdown bitcoin-qt), with hex editor i found in it: mkey ckey (117 that looks fine) Does this ...
0
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1answer
131 views

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 ...
3
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2answers
7k views

how do I create and encrypt a dogecoin wallet?

I've looked at the dogecoin wiki, but don't see any resources explaining how to actually create a wallet and encrypt it. I'm running dogecoin-qt on Linux. Under "much receive" on the GUI, I can add ...
2
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2answers
64 views

Conditional based Crypto based on Smart Contracts

Is it possible to store an encrypted message in the blockchain that reveals itself only when a particular condition is met? I think that the conditional disclosure can be done with Smart Contracts, ...
7
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3answers
2k views

Using the bitcoin wallet PKI for message encryption

Is it possible for a message sender to encrypt a message string with a receiver's public wallet address, email this ciphertext to the receiver and then have the receiver decrypt the message using ...
3
votes
3answers
159 views

Securely encrypting a cold storage wallet

I'm going to buy bitcoin to exchange BRL to CAD currency, as it's gonna be a great amount I'm concerned about the security of my wallet. I don't want to use a physical backup like paper or device ...
1
vote
3answers
376 views

Where can I go to read up on encryption methods used in Bitcoin?

Where can I go to read up on encryption methods used in Bitcoin? I am particularly interested in the idea that I can use a private key to sign something and it proves to the world I have the private ...