# Base class to modelize cryptographic ciphers
abstract class Cipher

	# Encrypted data
	var ciphertext = new Bytes.empty is writable

	# Unencrypted data
	var plaintext = new Bytes.empty is writable

	# Encrypt plaintext and populate `self.ciphertext`
	fun encrypt is abstract

	# Decrypt ciphertext and populate `self.plaintext`
	fun decrypt is abstract

end