3 min de lectura
Ethereum: How would one «Encrypt» a message using a Bitcoin *public key* and use its private key to decrypt it?
CRYPTOCURRENCY
Encrypt a message with a bitcoin public key and private key
In this article, we will examine how to use the public key of bitcoins and its corresponding private key to encryption and decrypting messages. As an example, we will focus on Ethereum, but similar methods can be used for other blockchain networks.
Encryption of a public key
In the context of cryptography, the public key refers to a few keys: a public key (often shown in Xpub) and the appropriate private key (usually displayed «Y»). In this scenario we will use the Ethereum Public Key (EPK) format, which is commonly used to encrypt public keys.
Encrypting message using Bitcoin EPK:
- You can do this on the Bitcoin website or using Electrum Wallet software.
2.
Using a private decryption key
Decrypt a message using a private key:
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- Decorate the public key : Use JWT decrypting as an entry for a public key in the XPUB form.
- JWT transfer to message
: Finally, the transfer of the decipher message from the public key to the original text format.
Example of code
Here is an example of a code fragment using the eéters.js library:
`Javascript
Const Ethers = requires (‘ether’);
// Define a private key and message
Constvay = ‘Your_private_Key_here’;
Const Message = ‘This is a test message.’;
Const EncryptedMessage = ‘Encrypted_Message’;
// convert EPK to jwt
ASYNC CONDOPKTEJWT features (EPK) {
Const jwt = wait for ethers.utiles
Return JWT;
}
// decrypt the public key
DESIFRTEWITHPublic function (JWT, Publickeke) {
// JWT transfer to message
Const MessageFromjwt = Waiting for ether.Utils.Racovermessage (JWT, Publicish);
Return the message from.
}
// Example of use:
Async function Main () {)
Const EPK = ‘0x … your_EPK_HERE …’;
Const jwt = wait for coneskojwt (EPK);
Const DecreptedMessage = wait for skipryptwithpublic (JWT, EPK);
Console.log (decipherd); // This should print the original message
}
Basic ();
`
Note : Remember to change your_private_Key_here and 0x … Your_EPK_HER … with the actual values of your personal key and the EThereum public button. Before starting this code, make sure you have installed the required libraries (thers.js).
In conclusion, the use of Bitcoin EPK and its corresponding private encryption key and decryption of messages is a safe method in the context of blockchain cryptography. The introduced example shows how to convert an encrypted message from the Ethereum public key format to the JSON web token (JWT) and then return to a message that can be decrypted by the same public key.
