The PlayStation 3, Xbox One, and PlayStation 4 use Blu-ray BD-ROM discs. In addition to any protection provided by the consoles themselves, the BD-ROM format's specification allows for a ROM-Mark which cannot be duplicated by consumer-level recorders. While the BD-ROM format does provide considerable capacity (up to 100 gigabytes per disc with potential revision to provide more), increased consumer bandwidth availability combined with the increased size of games distributed through online channels (approaching 100 gigabytes for some titles) is rendering this point moot. To prevent the consoles themselves being hacked and used as a means to defeat these protections (as happened with the Wii and partially with the PlayStation 3), contemporary consoles employ trusted hardware paths that authenticate the internal hardware and software prior to operation.