The following code demonstrates the process of encrypting and decrypting a message using an Ethereum account and the Fernet encryption algorithm.
-
Ethereum Account Generation:
- Generate a new Ethereum account using
eth_account.Account.create()
. - Obtain the private key from the generated account.
- Generate a new Ethereum account using
-
Key Derivation:
- Derive a symmetric encryption key from the Ethereum private key using PBKDF2 (Password-Based Key Derivation Function 2).
- Choose a salt value and set the number of iterations for the KDF.
- Use the
cryptography.hazmat
module to perform the key derivation.
-
Key Encoding:
- Encode the derived key to base64 using
base64.urlsafe_b64encode()
to ensure compatibility with the Fernet encryption algorithm.
- Encode the derived key to base64 using
-
Encryption:
- Prepare the message to be encrypted.
- Create a Fernet cipher suite using the encoded key.
- Encrypt the message using
cipher_suite.encrypt(message.encode())
.
-
Decryption:
- Create a new Fernet cipher suite using the encoded key.
- Decrypt the encrypted message using
cipher_suite.decrypt(encrypted_message)
.
Note: The code can be further expanded and modified as per specific requirements, such as incorporating error handling, secure storage of private keys, and appropriate choice of cryptographic parameters.
Please ensure you follow best practices for key management and security when working with sensitive data.
Feel free to modify and enhance the code to meet your specific needs and requirements.