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Questions tagged [ecdsa]

In cryptography, the Elliptic Curve Digital Signature Algorithm offers a variant of the Digital Signature Algorithm which uses elliptic curve cryptography.

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Signing a raw transaction, OpenSSL, C++

I'm trying to sign my raw transaction and each time I'm getting a different signature (r, s). Please help me how to sign transactions properly in C++ OpenSSL. I'm trying the following way but ...
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140 views

Ethereum public key recovery validation

I always thought that only the person(s) in possession of the private key to an address would be able to spend or change state for that account. But by using the recover technique rather than the ...
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Cross-posted from Stack-Overflow: Using Google Cloud Key Management Service to sign an Ethereum transaction

Cross-posted from question I've been working on writing a signer service for an Ethereum transaction manager and I need to sign Ethereum transactions using Google KMS Golang APIs. I'll try and ...
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161 views

How to pass bytes32 to Web3.methods.function.call

I have a contract that is doing an ecrecover: function recover(bytes32 h, uint8 v, bytes32 r, bytes32 s) public returns (address) { return ecrecover(h, v, r, s); } It works ...
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43 views

Can transaction hash be used to get v, r, s parameters using web3js?

I am trying to create a function which can be used to get the v, r, s parameters (ECDSA) of the signature. So i am thinking to pass a random tx hash from etherscan and it will return v,r,s parameters ...
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427 views

ECDSA Transaction Signature Values (V-R-S) — Interpreting and presenting it to layman users

In Quorum + Web3, I used getTransaction and it returned me the necessary details and also V-R-S. Understand that VRS is part of the ECDSA signature. There is a need to interpret and present these ...
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1answer
274 views

verify ecdsa signature in solidity

I want to create a smart contract that contains the public key of a party (the key is generated outside the blockchain) and contains a function to verify signed data. How can we implement this ...
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Does value of v represent that coordinate y of (deterministic k * G) is even or odd in Ehereum?

I'm quite confused about whether value v is related to deterministic k derived from RFC6979. I know that we can try 4 possibilities of v and compare to public key. And if (lower r, y is even), then ...
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30 views

What way there is to implement a new signing scheme in Ethereum?

I want to deploy a new signing scheme for the Ethereum transactions as an alternative to the currently implemented ECDSA. This will be for future research purposes on post-quantum signing schemes. The ...
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109 views

Ethereum Signature Information

I am currently working with Ethereum Signatures (ECDSA and r, s ,v values) and I'm looking for official information about the recovery id v. A few posts like this one explain how the calculation is ...
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277 views

(NEW UPDATE: I need to run “testrpc”) Signing a message using “ethereumjs-abi”? (Error: Invalid JSON RPC response: “”)

I am trying to sign a message using following JavaScript code (from HERE) function constructPaymentMessage(contractAddress, amount) { return ethereumjs.ABI.soliditySHA3( ["address", "uint256"], ...