from cryptography.fernet import Fernet def encrypt_message(public_key, message): # Get the public key in bytes public_key_bytes = bytes.fromhex(public_key) # Generate a symmetric key symmetric_key = Fernet.generate_key() # Encrypt the message using the symmetric key f = Fernet(symmetric_key) encrypted_message = f.encrypt(message.encode()) # Encrypt the symmetric key using the public key rsa_key = RSA.import_key(public_key_bytes) cipher_rsa = PKCS1_OAEP.new(rsa_key) encrypted_key = cipher_rsa.encrypt(symmetric_key) return encrypted_key, encrypted_message

import ecdsa # Generate a private key private_key = ecdsa.SigningKey.generate(curve=ecdsa.SECP256k1) # Get the public key public_key = private_key.get_verifying_key() # Encode the keys to hexadecimal format private_key_hex = private_key.to_string().hex() public_key_hex = public_key.to_string().hex() print(f'Private key: {private_key_hex}') print(f'Public key: {public_key_hex}') from cryptography.fernet import Fernet def encrypt_message(public_key, message): # Get the public key in bytes public_key_bytes = bytes.fromhex(public_key) # Generate a symmetric key symmetric_key = Fernet.generate_key() # Encrypt the message using the symmetric key f = Fernet(symmetric_key) encrypted_message = f.encrypt(message.encode()) # Encrypt the symmetric key using the public key rsa_key = RSA.import_key(public_key_bytes) cipher_rsa = PKCS1_OAEP.new(rsa_key) encrypted_key = cipher_rsa.encrypt(symmetric_key) return encrypted_key, encrypted_message from cryptography.fernet import Fernet def encrypt_message(public_key, message): # Get the public key in bytes public_key_bytes = bytes.fromhex(public_key) # Generate a symmetric key symmetric_key = Fernet.generate_key() # Encrypt the message using the symmetric key f = Fernet(symmetric_key) encrypted_message = f.encrypt(message.encode()) # Encrypt the symmetric key using the public key rsa_key = RSA.import_key(public_key_bytes) cipher_rsa = PKCS1_OAEP.new(rsa_key) encrypted_key = cipher_rsa.encrypt(symmetric_key) return encrypted_key, encrypted_message
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What is a Paper Wallet on Bitcoin: and is it safe?

by publicnotice.crypto@gmail.comDecember 28, 2022January 4, 2023
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A paper wallet is a type of offline storage for cryptocurrency, specifically Bitcoin. It consists of a piece of paper or other physical medium with a public address and private key printed or written on it. The public address is the address that can be shared with others to receive Bitcoin, and the private key is a secret code that allows you to access and spend the Bitcoin stored at that address.

Paper wallets are often used as a secure way to store Bitcoin, as the private key is not stored electronically and is therefore not vulnerable to hacking or other forms of cyber attacks. To use a paper wallet, you simply need to transfer Bitcoin to the public address printed on the wallet, and then use the private key to access and spend the Bitcoin when you want to.

There are a few different ways to create a paper wallet, but one common method is to use a website that generates a new public address and private key for you, and then allows you to print them out. Alternatively, you can create a paper wallet using a Bitcoin wallet software program and a printer.

It’s important to note that while paper wallets can be a secure way to store Bitcoin, they are not completely foolproof. For example, if the paper wallet is lost or damaged, you may not be able to access the Bitcoin stored on it. Additionally, it’s important to keep the paper wallet in a secure location to prevent it from falling into the wrong hands.

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