Questions tagged [encryption]

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

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110 views

Bitcoin and encryption

To the best of my understanding Bitcoin uses encryption to create the digital signature, basically, by encrypting the hashed message (transaction?). Would like to get your expert opinion to my claim ...
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Bitcoin Private Key Decryption

At present, I have dumped my wallet and have all private key, address information. I am now wanting to understand the decryption process for the private keys within the wallet. I have completed the ...
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3answers
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Ironically, encryption is not an important part of bitcoin (?)

The above statement is taken out of a book which I've been reading: Mastering Bitcoin 2nd Edition. ...as its communications and transaction data are not encrypted and do not need to be encrypted ...
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Why doesn't the Bitcoin-qt client ask for the Wallet passphrase upon startup?

I've just encrypted my wallet.dat file using the "Settings -> Encrypt Wallet" menu option. I then closed the client and re-opened it. I was expecting to be prompted to put in the wallet password ...
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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 ...
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1answer
27 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 ...
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1answer
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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 ...
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1answer
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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1answer
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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 ...
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1answer
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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 ...
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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, ...
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1answer
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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 ...
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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 ...
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44 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?
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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?
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1answer
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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 ...
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261 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)....
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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.
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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....
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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 ...
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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 ...
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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 ...
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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 ...
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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/...
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1answer
2k 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? ...
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182 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 ...
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1answer
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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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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 ...
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5answers
707 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 ...
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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, ...
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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 ...
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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, ...
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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 ...
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2answers
2k views

Do all Cryptocurrencies uses same Public key Cryptography algorithm?

I have been trying to read about how Public key cryptography works and I have just understand what public key cryptography is and how it differs from symmetric key cryptography. I have also just read ...
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119 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 ...
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1answer
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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 ...
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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 ...
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3answers
161 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 ...
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Is the Password stored in RAM in clear text after decrypting the MultiBit HD wallet?

After decrypting your wallet in MultiBit HD, is the clear text version of password stored in the RAM?
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1answer
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How should I encrypt a bip39 mnemonic with a password?

With no server and only in the browser I'm generating an a bip39 key and giving the user the mnemonic to store some place safe for restoring, I also want the user to be able to login with a password. ...
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867 views

Should I put my bitcoin wallet on an encrypted disk or not?

Is it really beneficial to put my bitcoin wallet on an encrypted disk (LUKS encrypted)?
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Can't start bitcoind after wallet encryption (Bitcoin Core)

pretty new to the Bitcoin world! I downloaded Bitcoin Core and got everything up and running. I then attempted to encrypt my wallet, and after successful encryption can no longer start bitcoind. ...
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Is there any implementation of attribute-based encryption on top of Bitcoin?

I've found a few papers detailing how you could do it in theory, but haven't seen anything in practice. Like a system for distributing bitcoin to private keys, where those keys are only distributed ...
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Is this how I should calculate a Double SHA256

So I have a function called sha256 which will take a string and return the SHA-256 hash. var First = sha256('myfirstSHA'); And the output is the hex: ...
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2answers
536 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 ...