Okay. Now the question was, how "robust" was the encryption? There are thousands of ways of encrypting a file; maybe a dozen are in widespread use. Of this dozen, they range from theoretically unbreakable (practically speaking, there's no such thing as totally unbreakable encryption) all the way down to as insecure as a safe door sealed with nothing but masking tape. My next step would depend entirely on the kind of encryption Barnard had selected for his message.