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Questions tagged [anonymity]

Questions related to user anonymity. For questions related to data and smart contract privacy, use the [privacy] tag.

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Is it possible to hide wallet address with ZK proofs

We are working with zk contracts on partisia blockchain, so out of curiosity I want to hide the senders address while sending a transaction. Consider a case where we are minting NFTs anonymously, if ...
Aman Mehra's user avatar
0 votes
2 answers
456 views

What are some Tornado Cash alternatives?

I used Tornado Cash in its earlier days, but I stopped using it after it faced sanctions. What are some other dApps available that can be used for private transactions on Ethereum? I'm not referring ...
Maximus Stacks's user avatar
4 votes
0 answers
111 views

How the mimc bug from circomlib was safely exploited in practice on Tornado Cash?

Several years ago, there was an unenforced constraint on verification in the cirmcomlib library : a tool for building projects using ZsNarks. The error allowed to forge cryptographic nullifiers/proofs ...
user2284570's user avatar
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0 votes
1 answer
147 views

can an ipfs node identify a partner in file transfer?

I just finished reading the whitepaper. It seems to me that IPFS does not provide anonymity in case of files with narrow use. Specifically, if I add a file to my IPFS node, and provide its hash to ...
f.khantsis's user avatar
0 votes
2 answers
312 views

How does nullifier prevent double spending in tornado cash?

I know that to withdraw money from tornado cash, the sender has to send proof of (secret, nullifier). If it is verified by the contract, it withdraws money. To prevent double spending, the sender also ...
Yilmaz's user avatar
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0 votes
0 answers
304 views

Can binance trace one's IP address or some other private data?

All the validators of the binance networks belong to Binance the company and as such as centralized, right? In case something shady happens, such as a hack that has to do with a vulnerability in a ...
kennya's user avatar
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0 votes
2 answers
2k views

Decentralized exchange that lets you cash out Ether for fiat money?

Uniswap is a decentralized exchange that doesn't require KYC or ID for trading between ETH and ERC-20 tokens (altcoins), while Bisq is a decentralized exchange that doesn't require KYC or ID for ...
user610620's user avatar
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2 votes
0 answers
1k views

Ethereum web wallet for Tor

Can Metamask wallet ethereum addresses be created in the Tor browser, given that Metamask is a browser extension? If not, what web wallet is most appropriate for Tor users, especially on a WindowsPC ...
user610620's user avatar
  • 1,528
2 votes
0 answers
166 views

Hide the Sender Address

In ETH system, is it possible to hide the sender address of transactions by 3th party, "zk-SNARK" or others? And if yes, any suggestions? Thanks.
Timothy's user avatar
  • 21
3 votes
2 answers
1k views

Using NFT paired to credentials for identity verification

I have a question on the feasibility of pairing a non fungible token (NFT) with credentials for identity verification on the Ethereum blockchain. Can we imagine a scenario where a user would have a ...
Benjamin's user avatar
0 votes
1 answer
636 views

Commit-Reveal Sequence Design

Let's cook up a scenario to ease understanding: We have a group of 5 people (addresses) who must vote on a question. The people can only vote True or False i.e. a boolean. The result of the vote ...
NowsyMe's user avatar
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1 answer
49 views

Data integrity and privacy [closed]

I have a crowd sensing system where user after checking the task I provide for a location x, sends temperature values to the contract of that location. I've been trying to a way to implement data ...
user51821's user avatar
  • 159
0 votes
2 answers
136 views

Auction contract privacy

I have an auction contract, where bidders bid with Ether then me (owner) select which offer is most suitable and thus this bidder is contract winner. Once the winner is selected, I send him data as a ...
user51821's user avatar
  • 159
2 votes
0 answers
231 views

Simple mixer in ethereum

I have found this mixer proposal https://hackmd.io/@HWeNw8hNRimMm2m2GH56Cw/rJj9hEJTN?type=view I'm is interested in this topic, but from my point of view with a current ethereum state it won't work. ...
Igor Dulger's user avatar
0 votes
2 answers
71 views

Privacy concern

I have a smart contract where user submit data based on a task set by the owner, post doing so the owner in another contract offers this data to the highest bidder. Is it possible to ensure the ...
user51821's user avatar
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0 votes
1 answer
186 views

User anonymity while submitting data in smart contract

I've written a smart contract, that is a crowd sensing system. Where post posting a task user view that task and if they have what I'm asking for/and meet the task requirements they submit certain ...
user51821's user avatar
  • 159
0 votes
0 answers
74 views

Anonymous Coinbase Transaction

Is there any solution to have anonymous coinbase transaction in ethereum or other Cryptocurrency? Something like using coinjoin for coinbase transactions or something else.
reza nourmohammadi's user avatar
2 votes
1 answer
650 views

How to implement Ethereum mixing (or coin tumbling) to preserve anonymity in smart contracts?

According to this answer: (https://ethereum.stackexchange.com/a/62694/23024) one of the approaches to anonymize users in smart contracts is: "writing a smart contract which accepts Ether ...
Questioner's user avatar
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0 votes
1 answer
1k views

Anonymity preserving approaches in smart contracts?

What approaches are practicable to enhance anonymity in smart contracts? P.S.1: Some proposals have been proposed such as Hawk or ZoE project ;however, I am looking for other approaches. P.S.2 : ...
Questioner's user avatar
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1 vote
1 answer
204 views

Hiding values from calculation (zkSnarks?)

In reference to a calculation of a hidden stored value. For example: Account A & Account B Both have hidden stored values. Accounts A cannot know B's hidden stored value, and vice versa. Is ...
AstroBoy's user avatar
2 votes
2 answers
166 views

Is there any way to fund a new account privately via a randomising pool?

It isn't currently possible to create a new HD wallet account and privately fund it, is it? I'm aware of this thread, but I'm not asking about SNARKs. Instead, I'm curious if there's any way to send ...
Paul Razvan Berg's user avatar
3 votes
1 answer
2k views

Is it logical to use "Proof-of-Authority" for a "public" blockchain?

According parity.io website: Proof-of-Authority is a replacement for Proof-of-Work, which can be used for private chain setups. And also: The chain has to be signed off by the majority of ...
Questioner's user avatar
  • 2,680
3 votes
1 answer
544 views

How to use the zksnarks capability of Ethereum?

Simple question but I couldn’t find the answer anywhere… How to use the zksnarks capability of Ethereum in order to perform fully Anonymous sending of Eter from one wallet to an other one ?
user2284570's user avatar
  • 1,018
0 votes
2 answers
308 views

Is there any anonymity in Proof-of-Authority?

According to the following article, Proof_of_Authority (PoA) is a modified form of Proof_of_stake (PoS) where instead of stake with the monetary value, a validator’s identity performs the role ...
Questioner's user avatar
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2 votes
0 answers
562 views

How to fund Ethereum address relatively anonymously? (breaking a link with an already established address)

I want to deploy smart contract. I just don't want people inspecting the code on Etherscan to see what crappy ICOs I've sent my ETH back in 2017... Some options coming to mind: use Shapeshift ...
Mars Robertson's user avatar
3 votes
4 answers
3k views

Is it possible to obscure the owner of a non-fungible token?

Basically, I'd like to have unique records which can be transferred between parties without anyone knowing who owns a particular record until a transfer occurs, at which time only the recipient can ...
user9657's user avatar
3 votes
2 answers
358 views

Can variables be read by miners? [duplicate]

Suppose I have an array of addresses which I append to somewhere in the contract. Do the miners (or anyone else) have a way of figuring out what the variables holds in terms of data? In other words, ...
ninesalt's user avatar
  • 488
2 votes
1 answer
443 views

How are some addresses known to belong to certain exchanges?

I searched for a Ethereum address into etherscan.io and it showed me that it was a Poloniex address. That address was the receiving address of a wallet I created on Poloniex. How did etherscan know it ...
Sam's user avatar
  • 23
2 votes
3 answers
1k views

How to make a token private

How can I create a smart contract that has a function that receives an input ( either eth or another erc20 token ) and sends it to a specified address without revealing who sent it? Basically making ...
John's user avatar
  • 21
1 vote
1 answer
3k views

Tracing wallet IP address

I read about this privacy attack to the BTC network : https://bitcoin.stackexchange.com/questions/193/how-do-i-see-the-ip-address-of-a-bitcoin-transaction It is based on network observation from a ...
HelloWorld's user avatar
0 votes
0 answers
437 views

Is it possible to make ethereum private by default like how monero has it?

How would ethereum be made private and anonymous by default like how monero has it? Is it possible to turn an token into a fully private anonymous token by default?
Patoshi パトシ's user avatar
1 vote
1 answer
272 views

ENS: Guessing bids amounts and protecting bid anonymity

Regarding adding ETH for extra anonymity on an ENS bid, @Arachnid said: Disguising the exact amount makes it more difficult for people who have guessed what name you are bidding on to also guess ...
Tom Hale's user avatar
  • 3,107
2 votes
1 answer
275 views

Blockchain use case – Trying to understand provenance tracking

I am trying to understand how blockchain would be helpful in provenance tracking of goods. Example: Company X is using blockchain technology to import pork into USA. Let us assume there are many ...
Deepa's user avatar
  • 241
11 votes
3 answers
9k views

Is there any way to hide a transaction?

Is there any way to hide a transaction on the Ethereum blockchain? Some blockchain have protocols that implement this by default, like Monero and Zcash. Is something similar possible on Ethereum?
SilverCookies's user avatar
4 votes
0 answers
81 views

Will forthcoming ability to make transactions private hide gas usage and mining information?

I understand that people are working on allowing for more private transactions on the public Ethereum mainnet. This would involve hiding (at the very least) the from, to, value and probably input ...
Thomas Jay Rush's user avatar
3 votes
2 answers
227 views

Confidential value transfers

Is there currently any way to do confidential transactions with Ethereum for a custom token? If not, is there any work/research being done on how this might be possible?
coeniebeyers's user avatar
5 votes
2 answers
246 views

How can we find "the DAO" attacker on 17 June 2016?

This question is about the level of anonymity in the system. I would like to know how anonymous one can be at this ecosystem? In other words, is it possible to track down an individual responsible ...
Kobayashi's user avatar
  • 1,255
18 votes
5 answers
24k views

Is there any Ether mixer / tumbler available?

Quick checking around there are exactly two references to an Ether Mixer - this non functioning and here (r/ethereum) 24 days ago. Unless I am missing something how can I hide the source of an ETH ...
steganographic's user avatar
13 votes
4 answers
2k views

With a ring signature mixer, will Ethereum transactions be completely anonymous?

I was reading the Serenity PoC2. The part quoted below grabbed my attention. Does it imply full anonymity for Ethereum transactions should I decide to use the ring signature mixer? Ring signature ...
euri10's user avatar
  • 4,640
5 votes
1 answer
3k views

How anonymous are Ether transactions?

I read some sources that say transactions are anonymous, some that say they are semi-anonymous, and some that say they are not anonymous at all. In what ways are the transactions anonymous and in what ...
Donavan Theodor's user avatar
8 votes
1 answer
3k views

Can one use ethereum as a client over Tor?

Does ethereum work when there is only TCP available? Can one use ethereum as a client over Tor? It does not work for me. Using Whonix. So running the traffic over Tor is not an issue. Blockchain ...
adrelanos's user avatar
  • 183
17 votes
5 answers
3k views

How to increase my privacy on Ether accounts?

What would be the best way, if any, that one could change their address/account in order to make themselves unknown or hard to identify by people they traded with? More specifically, if I send ETH to ...
rethsid's user avatar
  • 1,898
8 votes
1 answer
835 views

Are linkable ring signatures available in Ethereum?

Are transactions with ring signatures available in Ethereum? There should be as anonymity/fungibility is important. Also, I think Vitalk Buterin mentioned it may be possible to implement an EVM ...
rethsid's user avatar
  • 1,898
9 votes
1 answer
887 views

Is it possible to achieve anonymous mixing through the Ethereum protocol?

Are any developers working on anonymous mixing? Is it achievable through the development of either smart contracts or dapps? Is information leakage reduced or eliminated?
high110's user avatar
  • 4,756