Cryptography Stack Exchange
Cryptography Stack Exchange

Questions tagged [cryptocurrency]

A cryptocurrency is a digital currency powered by cryptography. This tag is applicable only to Q&As about the CRYPTOGRAPHIC MECHANISMS used by a currency, not for questions about economy, usage, or acquisition of any particular currency. The latter kinds are unwelcome. Please note that Stackexchange has dedicated websites for Bitcoin, Ethereum, Monero, etc.

A cryptocurrency is a digital currency powered by cryptography. This tag is applicable only to Q&As about the cryptographic mechanisms used by cryptocurrencies, not for questions about economy, usage, or acquisition of any particular currency.

See this meta for why questions on practicalities, IT security, programming, variants, theft, social engineering, economics, sociology, legals of cryptocurrency are unwelcome.

Please note that Stackexchange has dedicated websites for Bitcoin, Ehtereum, Monero, etc.

Here are some links for your convenience:

286 questions
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How secure is the Bitcoin protocol?

Are there any evidence (other than not being cracked so far) that the Bitcoin protocol is secure? "How secure" is it? (I realize that this might not qualify as a meaningful question - feel free to edit if you can improve it. Also, if you liked this…
ripper234
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How are new coins minted in Proof of Stake systems

I've been trying to understand Proof Of Stake cryptocurrency systems, but I don't see how new coins are made using the Proof Of Stake system. My current understanding of Proof Of Stake People put up a certain amount of cryptocurrency they already…
sevensevens
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Can a digital money system exist, that's secure, anonymous and allows offline transactions?

I just read Offline anonymous electronic money systems and their cryptographical base , which asks for anonymous offline systems. The OP claims eCash is such a system, and the answer claims that fairCash is such a system. I've added security as a…
CodesInChaos
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How are objects sold as NFT's ("non-fungible tokens")?

I'm familiar with "blockchain" and the theory and technology behind cryptocurrencies, tokens, and the economics behind why such things are capable of having monetary value, however I've never been able to wrap my head around "non-fungible tokens"…
10GeV
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Are newer crypto currencies intrinsically more energy efficient, or just newer?

There's a lot in the news about the energy cost of Bitcoin recently. Recently Elon Musk talked about "currencies using <1% the energy per transaction of BTC". This page provides some values for comparison: Kilowatt hour (KWh) consumed per…
Mr. Boy
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How blockchain system manages it's memory limit for nodes?

As we know, in the blockchain system every node has historical data that contains all previous transactions to maintain the integrity and approve the future transaction. What if blockchain is implemented in everyday life and people makes billions of…
Sayed Uz Zaman
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How to decrypt using public key?

Can anyone decrypt ciphertext using a public key? I always thought we can only decrypt using a private key. In that case, what does this line in the RLPx documentation mean? Receiver receives the initiator handshake and decrypts it with its own…
Mahesh Uligade
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How does hardware wallet recovery work?

I'm investigating hardware cryptocurrency wallets and am trying to understand how recovery works from a technical point of view. These wallets typically provide a 24-word "recovery seed" from which the wallet can be recovered. What I'd like to…
w.brian
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How do you verify that an address is related to a private key

This is my first post. My interest for cryptography is exclusively motivated by cryptocurrencies. My question is: If I generate some keys, how do I actually verify that the address is indeed associated with that private key (without the need to test…
thomas
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Is that possible to prove that 'I do not know something' (i.e, the private key for a Bitcoin wallet) using cryptography?

Is that possible to prove that 'I do not know something' (i.e, the private key for a cryptocurrency wallet) using cryptography? The problem might be nonsense at first glance. But the intuition for this might be to prove that I do not hold the crypto…
MTANG
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Anonymous offline digital cash scheme

Can a digital cash scheme exist that is anonymous and offline using blind signature and anonymous signature?
Ayola Jayamaha
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Offline anonymous electronic money systems and their cryptographical base

What anonymous offline electronic money systems exist and what are they based on? I know only one currently - eCash, based on RSA blind signatures.
Vladislav Rastrusny
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Moving a monero wallet+ node from a disk to another one

I dont know where to put this question, and the most appropriate would be here i guess, i found no criptocurrency stack, if its not here i would apreciate a link to post this I've downloaded a monero node on my laptop which roughtly took 105GB and a…
Imeguras
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minimal trading amount per transaction, looking for exchange

I currently developed crypto bot with support of low transaction estimate to buy/sell. Now I am looking for exchange allowing to buy all possible pairs for under a \$1 or even less. Let's say BTC/USDT and I will be able to buy BTC for $1 or less.…
x-magix
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Why wouldn't you just refer to the hash of the jpg file in the NFT storage?

This question is in reference to this tweet. It seems people are using the url of third party websites to record the reference to the content for NFTs. Why can't people just hash the jpg files for their artwork and store it in the smart contract? If…
Noel
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