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Questions tagged [zero-knowledge]

The tag has no usage guidance.

0
votes
1answer
25 views

Can Ethereum verify zk-SNARK proofs?

I am wondering if the Ethereum Virtual Machine can verify a proof generated from a certain statement? Are there any precompiled contracts for verifying a proof?
1
vote
0answers
29 views

Javascript library to use zkSnark circuit

I would like to generate the proofs for zkSnarks on client side and therefore would need a library in javascript that helps to read a circuit and generate proofs. I found one combination here which ...
2
votes
0answers
34 views

Zero Knowledge Range Proofs

I am new to the world of Zero Knowledge Range Proofs. I read the following on GitHub: https://github.com/ing-bank/zkproofs The Zero Knowledge Range Proof allows the blockchain network to validate ...
2
votes
0answers
16 views

What mathematical concepts do I need to master in order to understand the Aztec Procotol?

What mathematical concepts do I need to master in order to understand how privacy in the Aztec Protocol works? When I look at the white paper, I have no idea what is going on; however, I am confident ...
3
votes
1answer
95 views

Zero Knowledge v Multi Party Computation (MPC)

I am struggling with understanding the difference between the two. From what I am putting together, they have different adversarial models, MPC adds the condition of collusion between parties i.e. ...
0
votes
1answer
57 views

crypto-signing in a smart contract -> verify the identity of a smart contract

my Question in short is: -> is it possible to digitally sign some data by a smart contract (e.g. with a secret key of the contract) and thus confirm that it was exactly this smart contract, who ...
22
votes
3answers
2k views

zk-SNARKs vs. Zk-STARKs vs. BulletProofs? (Updated)

zk-SNARKs, Zk-STARKs and BulletProofs are three major zero knowledge proofs to provide privacy for the blockchain technology. If we can compare them, (1) Bulletproofs and Zk-STARKs require no ...
0
votes
1answer
54 views

Meaning of “fungibility” in “Zerocash (Zcash)”? [closed]

According to the following article, Zcash provide a high level of "fungibility". compared to other crypto-currencies. Article link: https://www.investopedia.com/terms/z/zcash.asp fungibility ...
2
votes
1answer
67 views

Zero Trust vs Zero Knowledge — Difference [closed]

What is the difference between Zero Trust and Zero Knowledge?
3
votes
0answers
45 views

Is “Pinocchio zk-SNARK” a specific type of zk-SNARK?

Is "Pinocchio zk-SNARK" a specific type of "zk-SNARK"? And if yes, what is difference?
2
votes
1answer
480 views

An example on using “zk-SNARK” in “smart contract”?

I read this article: https://media.consensys.net/introduction-to-zksnarks-with-examples-3283b554fc3b However, it's not clear to me a function such as zksnarkverify has been already implemented in ...
5
votes
2answers
234 views

Updated: Is it possible to hide the sender or receiver of transactions by “zk-SNARK” or “Bulletproofs”?

To support the user privacy, is it possible to hide the sender address or receiver address of transactions by "zk-SNARK" or "Bulletproofs" ? Or we’ll be able only to hide the value that is mapped to ...
4
votes
3answers
445 views

Is there a decentralized zk-SNARK (zero-knowledge Succinct Non-Interactive ARgument of Knowledge)?

Normally, in zk-SNARK, we need to generate two public keys: one for prover and one for verifier. However, the input parameter of this generator algorithm must be secret, meaning that it must be hidden ...
1
vote
1answer
107 views

zk-SNARK use cases in blockchain (except payment)?

Is there other examples of using zk-SNARK for supporting "private transactions" except Zerocoin or Zchach ? (For example, is it possible to use zk-SNARK for health data ? or any other use cases in ...
2
votes
0answers
154 views

Hashing Algorithm Equality in zk-SNARK [closed]

I am looking to implement the zk-SNARK capabilities of Ethereum to allow a user to prove that they have all the components required ('a', 'b', 'c', 'd') to create a publicly known hash 'x'. My general ...
0
votes
0answers
13 views

Transfer from Etherscan to MyEthWallet and how the create account as the Username I use is invalid everytime…how it should be?

I provided MyEthWallet address for STX tokens to be transferred there, but the transaction is being made in Etherscan. How can we see that balance in MyEthWallet address. Whether the tokens still ...
9
votes
3answers
814 views

Can ZKSnarks be implemented on the Ethereum ecosystem?

Since Zcash seems to have it's ZKSnarks implementation finished (or almost at least). And versions of JPMorgan's Quorum had appeared with ZKsnarks implementations included see: https://www.coindesk....
5
votes
1answer
204 views

Can I make a “secret” invite only Smart Contract?

I have a public smart contract where I am able to make a secret and hash it within the contract. I then share the "secret" with N number of my friends and with the secret they can create a new hash (...
-3
votes
1answer
321 views

Did I actually just win 1 Ethereum? Is it truly mine?

I was looking for coins to mine & exchange for bitcoins when I found out about Ethereum. I have literally no knowledge about it or anything at all. I went for a site (https://freeeth.me/) to win ...
5
votes
1answer
528 views

Current state of zero knowledge proofs?

Are there any current proof of concepts or implementations of zero knowledge proofs in the context of smart contracts? If not how long until we can store private data on a public blockchain?
2
votes
1answer
121 views

Where can I find the snarkverify precompile (opcode) implementation in parity and the example coin mixing contract that utilizes it?

With the recent announcement of zkSNARKs support and the ZoE (ZeroCash over Ethereum) mixing contract (https://z.cash/blog/zksnarks-in-ethereum.html) Where can I find the mentioned parity branch and ...
9
votes
1answer
591 views

What data will zk-SNARKs protect?

Implementing zk-SNARKs is planned in Ethereum roadmap, what data will be obfuscated? transaction sender and receiver? data in transactions? data stored in contracts? variables and methods in ...