> You could make files only readable under root, unless CD is re-mounted with specific options which probably aren't available to a non-root user in the first p

> You could make files only readable under root, unless CD is re-mounted with specific options which probably aren't available to a non-root user in the first place. Doesn't Linux give non-root users read access to the CD's block device? And with that, couldn't you read whatever files you wanted anyway?