CAN bus, CAN-FD and ARINC-825 interfaces are used on military ground vehicles, commercial cars and trucks, military and commercial aircraft and a variety of industrial applications. Sital Technology’s Safe and Secure (SnS) technology satisfies the needs for cyber authentication, along with providing the capability to detect and locate electrical faults in CAN data buses on a continuous basis. In addition, Sital’s SnS includes functionality to provide denial of service (DoS) protection for CAN bus transmitters.
In approximately the first four seconds following power-up, Sital’s SnS sensor undergoes a learning” process performs continuous physical layer monitoring of received signals from all nodes on the bus. Out of this, the sensor and API software compute the “fingerprints” or “signatures” for all nodes on the data bus. Following that, the sensor monitors all received messages and looks for instances where message’s fingerprints don’t match the expected fingerprint.
These mismatches indicate either a cyber “spoofing” (or impersonation) authentication violation or an electrical fault condition. The latter includes intermittent or continuous open or short circuits in either the bus cable, a stub cable, connector, LRU or bus termination. Further, the SnS is able to determine the specific type of open or short circuit, along with its approximate location.
Following detection of either a cyber authentication violation or an electrical fault condition, the SnS API will immediately inform the application software about the detected condition. In either case, it is then up to the system’s “security playbook” software to take the appropriate system-level action.
Regarding SnS for CAN/FD BUS and ARINC-825-4, Sital provides denial of service (DoS) mitigation. This feature provides a low-level hardware means for preventing CAN bus nodes from transmitting continuously on a CAN bus. This guarantees that a node on a bus is running malicious or erroneous software, it can’t “take over” all bus bandwidth. As a result, this feature allows all nodes on a bus the opportunity to transmit.
CAN Bus/ARINC-825-4 Safe and Secure (SnS)
Sital CAN and ARINC-825 IP Cores, including for CAN bus/ARINC-825-4 Safe and Secure (SnS) IP Core
CAN Sequencer GRIP and PhysiCAN SnS GRIP Boards
Sital’s cutting-edge, innovative “SnS” Technology is designed for IP Core’s physical layer. We supply our products with DO-254 and DO-178 certifiability, including DAL A. Our partners: Logicircuit and ConsuNova provide the DO-254 and DO-178 artifacts. Through enhanced physical layer monitoring, the patented “SnS” analyzes all DataBus messages and provides 2 unique capabilities:
Validate each Bus message and prevent any malicious Bus messages from executing their attack! This includes BC firewall and an option to add “SnS” for cyber security IDS/IPS to new and existing MIL-STD-1553 designs.