class RSAEcryptionException(Exception):
    pass

class NotAnIterableObject(RSAEcryptionException):
    pass

class NotATextMensage(RSAEcryptionException):
    pass

class CastError(RSAEcryptionException):
    pass

class NotAKey(RSAEcryptionException):
    pass

class LoadKeyDictError(RSAEcryptionException):
    pass