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Questions tagged [message-verification]

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2 votes
1 answer
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How to manually verify an ECDSA signature in Python?

Maybe I got the formula wrong but I heard that x = (z*s^-1)*G+(r*s^-1)*K is the equation for verifying an ECDSA signature but my code says signature is invalid but the values are from a valid bitcoin ...
Alexio puk2sefu's user avatar
2 votes
0 answers
283 views

How does OP_CHECKSIG work for Taproot script path spending?

I've been studying all the ways Taproot transactions can be spent and I can get all of them to work except for when script path spending is used and the script is executed. Transaction 0c045625... is ...
Zephyrus's user avatar
  • 782
1 vote
1 answer
179 views

SIGHASH_SINGLE with no corresponding output

Transaction 99fc1e5c753459808bac56435b3d45f2fcf0dd73016ea14460d63e9ddf353714 is an interesting example. This transaction has 5 inputs and 1 output. All of the input scripts include 1 public key and 1 ...
Zephyrus's user avatar
  • 782
0 votes
1 answer
298 views

Relationship of R/S signature in between signed message and DER signature

this time is difficult for me to explain problem i was facing. i realize that R/S signature in DER signature is not match to the 1 in bitcoin signed message? Ok below is my say signed message. -----...
Atlas Chiew's user avatar
0 votes
0 answers
98 views

What is a simple way to sign a message to verify that you possess the private key for a specific public address?

I need to explain to somebody step by step how to go through the process of signing a message to verify they own the private keys associated with an address containing funds. This is to ensure ...
John Murphy's user avatar
0 votes
2 answers
929 views

How can I sign message for a blockchain watch only bitcoin address

I have to verify sign message for one of my blockchain bitcoin address. I couldn't find sign message or private key option in More Options beside all my bitcoin addresses. I thought maybe I have to ...
57bits's user avatar
  • 1
0 votes
3 answers
745 views

What are the realistic system requirements to run bitcoin core for generating wallets, signing and verifying messages on a laptop?

I need to be able to verify messages and check that funds in wallets are valid and that the claimed owner possesses the private keys (hence checking messages signed). I know that I need to be able ...
John Murphy's user avatar
1 vote
2 answers
570 views

Using BitcoinJS - How do you verify a message using a segwit bech32 (bc1…) / P2SH (3…) addresses?

I created a signature from a message using my private key. But how do I verify this signed message using my segwit addresses of 3... or bc1...? How do I verify this using the BitcoinJS library?
Patoshi パトシ's user avatar
0 votes
1 answer
54 views

Post Pow hash verification

I am unable to understand how a PoW(Proof of work ) activity takes extensive computation but the corresponding hash message verification of the final result is quick and easy. What process and flow ...
Raj's user avatar
  • 1
0 votes
2 answers
297 views

What is the command to sign a message using a segwit private key using electrum 3?

I want to sign and verify a message using a segwit private key that i generated with another application. How can I sign and verify a message using electrum 3 cli?
Patoshi パトシ's user avatar
1 vote
1 answer
359 views

Why the signature of the same message changes in some wallets, but not all?

Using the "message signing" feature in the Bitcoin and Dash it's static with the same message. Signing the same message with the same private key will result always in the same signature. This ...
Inkeliz's user avatar
  • 139
10 votes
3 answers
51k views

online tool to play around with ECDSA public keys, message signature verification?

I realize that this question may be borderline bannable because it's asking for suggestions on tools, but it will really help newbies. This online tool allowed me to play around with hashes and to ...
thanks_in_advance's user avatar
2 votes
0 answers
57 views

Proving sendership of transactions

Why does Bitcoin Core, on the message verification tab, say that verifying messages signed by Bitcoin addresses "only proves the signing party receives with the address, it cannot prove sendership of ...
Geremia's user avatar
  • 4,704
4 votes
1 answer
589 views

How to calculate signature generation, signature verification, transaction verification speed?

I read this post on Bitcoin Scalability. As far as I understand sequence of steps in Bitcoin, simplified version of performing transaction should be following: On Sender's side: Create transaction ...
Nur's user avatar
  • 521
2 votes
1 answer
466 views

How to verify signed bitcoin messages on my own website?

On my website, I want to be able to verify that messages are signed by a certain bitcoin address, similar to how it's done here. From my research it seems I have to use JSON RPC with some sort of ...
Andreas's user avatar
  • 21
2 votes
2 answers
87 views

When we receive a transaction or BitCoin payment, do we need to verify the message?

I'm new to BitCoin, and as I'm doing my adventure, found a site and gave me some micro BitCoins to test and see how the system works. Now, I finally received a message in my Transactions in my Wallet ...
Benjie Mangulabnan's user avatar
0 votes
1 answer
363 views

Authentificate myself as the sender of a bitcoin transaction [duplicate]

How can I prove my ownership of a tx's sending address to the receiver, assu? I can not answer This question, but to help anyone out, reading this: Since localbitcoin's signature verification is ...
GregorVolkmann's user avatar
1 vote
1 answer
136 views

How to remove an address used for signing from the key pool?

The message signing feature available in the Bitcoin-Qt client lets me prove that I own a Bitcoin address. I don't wish for this address to ever be used for a future transaction however. Is there ...
Stephen Gornick's user avatar
5 votes
2 answers
636 views

What is the legal money range for a bitcoin transaction?

What is the legal money range for a bitcoin transaction message ? I am guessing that the lower limit is one satoshi but what about an upper limit aside from the maximum block size constraint ?
boussac's user avatar
  • 103
7 votes
2 answers
4k views

How can I verify a signed message?

I can send a signed message using the standard client, but if I see a signed message in, say, a forum, how can I verify it? I understand this hasn't yet been implemented in the GUI for the standard ...
Highly Irregular's user avatar
7 votes
3 answers
2k views

Pseudocode to verify a signed message

Can someone explain or point to some documents with pseudo code that would show me how to verify bitcoin address based on a signature and message. I know how to do this in clients I want to know how ...
user1562's user avatar