Questions tagged [encryption]

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

21 questions with no upvoted or accepted answers
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Safety differences between full wallet encryption and only encrypting the private keys?

I'm a newcomer in the Bitcoin world and I wanted to ask the following questions regarding wallet security: What are the safety differences between fully encrypting the wallet.dat file and only ...
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69 views

Does Amit Sahai's indistinguishability obfuscator enable Autonomous Virtual Corporations or “Agents”?

Given that an "Agent" is described as Agents are autonomous programs that maintain their own wallet, which they use to buy server time. Money is obtained by the agent selling services. If demand ...
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251 views

Is there a way to import a private key already protected with the passphrase?

Let's say I have a hot wallet that has passphrase encryption enabled. Then let's say a large withdrawal needs to occur but the hot wallet has insufficient funds and a transfer from cold storage is ...
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2answers
86 views

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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336 views

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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2answers
144 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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92 views

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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77 views

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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89 views

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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168 views

How MultiBit stores password

I'm curious to understand how MultiBit stores my password. The fact is: I can restore the password by using the 12 words. From this answer it seems tha the AES key to encrypt the password is derived ...
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92 views

Java bitcoinj: semantics of 'decompress' on encrypted key

Calling the decompress method on an encrypted ECKey object yields an ECKey object which has no private key (only public). I personally would have expected to get the same encrypted key in uncompressed ...
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188 views

bitcoin-qt restored wallet.dat all synced closes after correct passphrase “assertion error crypt” HELP

Installed bitcoin-qt and replaced new wallet.dat with old wallet.dat backup Opened bitcoin-qt and let it sync and all blocks synced and wallet has correct funds and past transactions. I Want to ...
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95 views

Implementing Secret Sharing with an Encrypted Bitcoin Wallet

How would I implement Shamir's Secret Sharing Scheme with an encrypted Bitcoin wallet?
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1k views

How do I get my encrypted private key converted?

"addr": "typicalbitcoinaddress", "compressed": true, "encrypted_privkey": "this is my private key that is 96 characters long", "label": "Wallet", "pubkey": ...
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2answers
29 views

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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50 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 ...
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1answer
60 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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45 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 ...
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315 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 ...
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344 views

How can I access my private keys? Will the key get lock further if I enter the incorrect password too many times?

I exported my private keys and Multibit unencrypted but when I try to import the key files I am being asked for a password... copying the the key from text edit and pasting it into blockchain results ...
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3answers
374 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....