Questions tagged [encryption]

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

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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 ...
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Are hardware wallet seeds cross compatible over all brands and even software wallets?

I had a discussion today and I'm really confused. What I though is happening with each hardware wallet is this: Seed (BIP39) 1 --> HW Wallet (ledger) --> chip1 + seed = private key 1 Seed (...
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What time of encryption from late 2000s contains house, smileyface, squares, letters and numbers?

Have a encrypted password or key typed to paper, i vaguely remember doing it, not sure if note pad was involved or some site , i remeber something about sha-2 , and sha- 256, and why i should use one ...
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Why does the chacha20 implemented in the Bitcoin Core use a 64 bit nonce?

The draft of chacha20 uses a 64-bit nonce, but the final version of chacha20 specification uses a 96-bit nonce. The #9792 PR adds chacha20 to Bitcoin Core. We can see the function ChaCha20::SetIV(...
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Why does Bitcoin Core's RPC interface not use encryption?

As the Bitcoin Core docs state: Although Bitcoin Core's RPC interface does use authentication, it does not use encryption, so your login credentials are sent as clear text that can be read by anyone ...
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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 ...
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Can you get the seed phrase of a HD wallet from the private key of one of the wallets?

Let us say I have a HD wallet. Can I get it’s seed phrase from the private key of one of its wallets? Also are seed phrases just easy to remember private keys? If so does that mean that from the seed ...
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Decrypting Bitcoin Core wallet with password that contains special characters

I have come across a Bitcoin Core wallet that uses a special character for the passphrase. When attempting to decrypt, it accepts the password but does not decrypt part of the keys. Is there a known ...
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Public key Exceeding Mod P? A Clarification Request On The Discrete Logarithm Problem

I tried to observe / implement the discrete logarithm problem but I noticed something about it; but before I get into it let me give some clarification which is open to correction. a = b^x mod P ...
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Multi Party ECDSA?

Are there any alternatives to the Multi Part ECDSA implementation contributed by ZenGo?
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Security concerns with walletpassphrase

I have some security concerns with walletpassphrase: If it stores the passphrase for some unit of time. ie. so you can send funds, surely if the server is compromised, within that timeframe, the ...
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Recovering my old bitcoin wallet

As far as I can tell, my old bitcoin wallet got corrupted. It was created in Bitcoin Core in the 2014/2015s, and I'm trying to recover it. Bitcoin Core doesn't accept it anymore (and doesn't give an ...
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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 ...
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Isn't an encrypted wallet.dat automatically a "watch-only" wallet?

I have encrypted my wallet.dat outside of this computer. Now I store my wallet.dat on this computer. If I open it in Bitcoin Core, I can view the balance but not spend it (without entering the ...
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To test if my wallet.dat encryption password is correct, MUST I spend coins?

When a Bitcoin Core wallet is encrypted, you (apparently) have to enter the decryption passphrase only when trying to spend coins. You still get to "use" the wallet as in seeing all the ...
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Why is Bitcoin Core not asking me to enter the decryption key for my allegedly "encrypted" wallet.dat?

I created a wallet.dat with Bitcoin Core on a new PC. Then I encrypted it with the GUI menu. When I reloaded that computer, I was shocked to see that Bitcoin Core did NOT ask me to decrypt/unlock the ...
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Should I be using the "encrypt wallet" feature in Bitcoin Core?

All my wallet.dats have no password. However, the internal hard disk where the "live" one is located is encrypted, and so are the offline storage devices where I have my "cold" ...
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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 ...
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How long would it take to break a 32 bit key / encryption [closed]

I was actually wondering... How long would it take to crack/brute force a 32 bit key/encryption and a 16 bit key/encryptions respectively?
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Private key to WIF process

I have a private key for a storage bitcoin wallet (there's not much in there I'm just testing methods) but it is in private key form and to import it to my main wallet I need to convert it into WIF. ...
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Should I Encrypt my Wallet for Cold Storage?

I understand that the Bitcoin QT wallet is already encrypted to some extent when I use a password. Is it best-practice to further encrypt the wallet file for long term storage?
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Bitcoin core wallet backup corrupted by an external tool

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 ...
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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?
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A security need for Bitcoin to fork to quantum resistant algorithm in a few years?

in just a few years I believe that quantums will exist that break asymmetric ciphers, and bitcoin is based on asymmetric ones like public-key-cryptography, correct? Symmetric algorithms are supposed ...
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Ledger 8 pin number how hard in terms of entropy is it to guess?

ledger has a max. 8 number pin for unlocking it as far I know. I am very interested, can someone say if (given any method/resources) it is in any scenario (except luck) possible to guess this 8 ...
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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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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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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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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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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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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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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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1 vote
1 answer
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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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3 votes
1 answer
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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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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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3 answers
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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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2 votes
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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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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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