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Questions tagged [ring-signatures]

A ring signature is a group of cryptographic signatures with at least one real participant, but there is no way to tell which in the group is the real one as they all appear valid, while the key image prevents double spends.

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What is RingCT and how does it compare to Confidential Transactions?

What is RingCT and how does the addition of Ring Signatures enhance the privacy properties of RingCT compared to Confidential Transactions as designed by Greg Maxwell? https://people.xiph.org/~greg/confidential_values.txt
neversleep
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Spam attack to gain control of many outputs and undermine privacy

Would it be possible for an attacker to send many transactions to himself with the goal of gaining control of many outputs for the purposes of deanonymizing transactions of others (using low mixins with most outputs sometimes controlled by the…
Luke Benton
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Could Monero help me to implement a safe election for a small group of students?

The problem I am in charge of implementing a secure, secret election for a small group of students on my school. I have a list linking valid student IDs to emails, and I want each one of them to vote in a candidate that will ultimately be elected.…
MaiaVictor
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If I send two transactions to the same recipient, can they infer the true sender?

I send two transactions to the same recipient. The two sets of mixins used to generate the transactions would each include my public address. Is the recipient then able to reasonably infer that my address is that of the true sender?
SpaceRace
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Are there more cryptocurrencies based on the cryptonote protocol? If so what are the main differences?

I read a bit about the history of Monero and how it forked away from bytecoin/bitmonero in 2014. I also remember that there was another currency using the cryptonote protocol called "Boolberry" at that time. Right now cryptonote appears to be a…
stke
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What's the point of ring signatures if stealth addresses hide the actual addresses anyways?

I understand generally how ring signatures work, but I also realize they are sent to and from stealth addresses, and so I'm curious why ring signatures are needed in the first place. Doesn't a sender's stealth address make the transaction…
user4
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Can someone walk me through a simple example to explain how RingCT works?

Original: https://www.reddit.com/r/Monero/comments/5irg81/questions_regarding_the_cryptography_behind_ringct/ I just read the RingCT paper, and there are a couple things that could use some clearing up for me. What is the m (message?) value that is…
kenshi84
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Ring signature with sublinear size increase

The Wikipedia article on Ring signatures states that CryptoNote implements O(n) ring signature scheme by Fujisaki and Suzuki in p2p payments to achieve sender's untraceability. More efficient algorithms have appeared recently. There are schemes…
Clement J.
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CryptoNote features in other cryptocurrencies

How many CryptoNote based currencies exist today? Have ring signatures appeared in any cryptocurrencies that are not based on CryptoNote? How many CryptoNote coins are not using a CryptoNight based PoW?
Luke
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What level of cryptographic review has the current Monero protocol received?

What are the backgrounds of the members of the Monero Research Lab? What amount of known peer review have their publications received? Independent of Monero itself, how much Cryptographic review has their been of EdDSA for signatures, and…
Susan
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Mixin 0 (mixin 1) transaction ban

Does the network still accept mixin 0/1 transactions? Did Poloniex update their transactions to use a higher mixin?
CQM
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Is there a tool that tells me if my transfer has been used by others in a ring signature?

Is there a tool that, given a tx hash and/or a specific output, can search through the blockchain to see if it's been used as input in other transfers? This would preferably not be a web service but something I run offline on my own copy of the…
user1161
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What signature prevents me from spending others' coins?

In passive mixing, the monero wallet finds n other parties and forms a ring signature that proves the signer is one of the parties in the ring, and hence entitled to spend from one of the accounts associated with one of the ring parties. I don't…
bekah
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Ring signature and blockchain analysis

I'm struggling to understand how ring signatures protect against blockchain analysis. Each time a transaction is made on the Monero blockchain some outputs already present on the blockchain are used to make a ring signature so that there is no way…
ant Bldel
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When you sign a Monero transaction, are you signing a hash?

When you are signing a Monero transaction, do you sign the transaction itself, or do you hash the transaction and then sign that?
Christopher King
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