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Questions tagged [secp256k1]

Secp256k1 is the name of the elliptic curve used by Bitcoin to implement its public key cryptography.

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Confusion around point addition on secp256k1

I am using https://github.com/HareInWeed/gec for point addition on the secp256k1. The code below adds two points on secp256k1 curve and displays the results. #include #include #include #include…
Nikhil Srinivas
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construction of ES256KSigner throws mis-match private key length

I tried to build a siger to sign a verifiable credential using jwt format. But the construct of ES256KSigner fails Invalid private key format. Expecting 32 bytes, but got 43. I am not familar with cryption, and only guess there is some wrong…
shijie xu
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Can I use a BLS12-381 private key to sign Ethereum transactions?

I'm new to cryptography and I've recently been studying BLS signatures. Please forgive me if I make any mistakes while writing. I've tried generating a BLS key pair and using the private key to derive an Ethereum account and sign on-chain…
pgermani
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"non-hexadecimal number found in fromhex() arg at position 65"

I made a program that makes Bitcoin Address with random private key. Some variables and methods that do not have a separate description are the fixed values of the SECP256K1 elliptic curve. As they are not related to errors, I omitted…
Dino_coder
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using paulmillr/noble-secp256k1 with deno deploy

I have this line in my file: import * as secp256k1 from "npm:@noble/secp256k1"; It works fine locally (deno run) When I try to deno deploy, it cannot find the module. I read this is because deno deploy doesn't yet support npm:. To circumvent it I…
Uri
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Public key generator in Python (SECP256K1 elliptic curve cryptography)

I am currently new in Python and cryptography. I am trying to make a public key of SECP256K1 elliptic curve manually(without related library use), from a random generated private key as I learned. The method of generating private key is free. What…
hib0823
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Significance of setRelaxVerificationKeyValidation() in JwtConsumerBuilder() while validating the JWT

val jwtConsumer = JwtConsumerBuilder() .setVerificationKey(getPublicKeyFromPEMString(publicKeyAuth)) // verify the signature with the public key .setRelaxVerificationKeyValidation() // needed if the key is smaller than 256 bits …
Benjamin
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Run blockscout on M1 chip

I'm trying to run blockscout on my local machine (M1 chip). Following this guide, I'm getting this error: Generated mix_erlang_tasks app c_src/build_deps.sh Cloning into 'secp256k1'... remote: Enumerating objects: 8569, done. remote: Counting…
Meldum
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how reverse an algorithm in c

i have the following formula for generating public key hash160 h = h0+h1+h2+h3+h4+h5+h6+h7+h8+h9 pubkey = g.base[h0]+g.offset[h1]+g.offset[h2]+g.offset[h3]+g.offset[h4]+g.offset[h5]+g.offset[h6]+g.offset[h7]+g.offset[h8]+g.offset[h9] And the…
terry franklin
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How to fix secp256k1 error while installing sawtooth-sdk python in Windows 10

C:\Users\akhilesh.s>pip install sawtooth-sdk Collecting sawtooth-sdk Using cached sawtooth_sdk-1.2.5-py3-none-any.whl (97 kB) Requirement already satisfied: colorlog in c:\users\akhilesh.s\appdata\local\programs\python\python311\lib\site-packages…
Akhilesh S Bhat
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Is it possible to build CLSAG ring signatures on Secp256k1?

Is it possible to implement CLSAG ring signatures with SECP256k1? And would the implementation be very different from this (https://github.com/crate-crypto/CLSAG) Ristretto255 variant of the CLSAG ring signatures? As I understand it, it doesn't…
TaylorProX
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How do I decrypt a Nostr message?

Here's how to send a private message to a Nostr Pubkey: const crypto = require("crypto"); const secp = require("noble-secp256k1"); const ourPrivateKey = ""; const ourPubKey = ""; const theirPublicKey = ""; const text = "Hello World"; let…
Mike
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Swift Key derivation. Public key decoding

I need a help with creating P256.Signing.PublicKey from child key that were got with using HMAC-Sha256 hashing (we implemented key derivation). And after that get a SecKey to create signature for messages I can't understand how to decode it. Child…
Alina
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In ethers.js, can recoverPublicKey be used for signature verification?

In the bitcoin wiki they describe the algorithm used to verify a signature using ECDSA with Secp256k1. This algorithm has 3 inputs: signature, message hash and publicKey. https://en.bitcoin.it/wiki/Elliptic_Curve_Digital_Signature_Algorithm In…
Luis F.
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How to generate ECDSA signature using secp256k1 curve and SHA256 algorithm for XML document in java

We can create XML Digital Signature using RSA keys. But how do I use elliptic curve keys to sign xml files ? I get exception at this line xmlSignature.sign(domSignCtx) as - javax.xml.crypto.MarshalException: Invalid ECParameterSpec …
VIJAYAKUMAR MAJJAGI
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