Security issues Devices on a FireWire bus can communicate by direct memory access -LRB- DMA -RRB- , where a device can use hardware to map internal memory to FireWire 's `` Physical Memory Space '' .

Security issues Devices on a FireWire bus can communicate by direct memory access . With Direct Memory access -LRB- DMA -RRB- a device can use hardware to map internal memory to FireWire 's `` Physical Memory Space '' .
