Ethereum: How is Public Key extracted from (message, digital signature, address)
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Extracting Public Keys from Ethereum Messages: Understanding The Relationship between P2PKH Addresses, Digital Signatures and Public Keys
The private key structure (P2PKH) of Ethereum is a crucial aspect of its cryptographic mechanism. In this article, we will deep how the public keys are extracted from a message, digital signature and the p2pkh address.
Basics: Ethereum’s Private Key Format
In the Ethereum Network, each account was a unique private key (p2pkh), which is a compressed version of 256 bits (32 bytes) of the User’s Wallet Expression. This phrase of seeds is used to get other keys, including public key and digital signature.
The Relationship between P2PKH Address, Digital Signature and Public Key
When you sign a message using the Ethereum digital signature function, the resulting exit (Digital Signature) contains information about your private key. The digital signature is generated by combining the public key of the sender with the Sender’s address, together with other cryptographic parameters.
The process involves:
- Signing : use the private key to generate a digital signature for the message.
- Compression and Coding : Digital Signature is compressed and encoded using a specific algorithm (eg base64).
- The Recipient’s Public Key : Your P2PK Address is used to get the recipient’s public key.
Public Key Extraction
Now, let’s examine how you can extract the public key from a message, digital signature and the p2pkh address:
- Digital Signature : Digital Signature Generated by Your Private Key Contains Information About Your Public Key.
- Address p2pkh : Your P2PK address is used to get the recipient’s public key.
- Public Key (Optional) : If you want to extract your own public key, you can use the following formula:
Key public
Here is a high -level example using the `eth_gettransceptecept 'function:
Javascript
Transaction const = transactionfactory.createtransction (
{
from: '0x', // the address of the Sender
to: '0x ...', // The Addressee Address
Date: Messaged, // User Message
Nonce: TXNONCE,
GasSrice: TransactionGasprice,
Gaslimit: Txgaslimit,
}
);
Const -Signature = transaction. Signature;
Const publickey = (Signature ^ transaction.getout (1) .tata) .tostring ('hex');
Console.log (publickey);
`
Important Notes
- This is a simplified explanation of the process. In fact, the private key format of Ethereum and cryptographic algorithms are more complex.
- Public Key Extraction Process assums that you have the necessary permissions to access and recover the P2PK Address of the Recipient.
- Note that extracting one’s own public key can be sensitive information, as it contains sensitive user data (EG, Wallet HIPS).
In Conclusion, While Ethereum’s Private Key Format Involves A Unique P2PKH Address Combination, Digital Signature and Useful Messages, Public Key Extraction is not simple. However, by understanding the relationship between these components, you can get information about the cryptographic mechanisms of ethereum and you can use this knowledge to develop personalized applications or to analyze the existing data.
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