Real-time, safety-critical systems MOST often use serial busses that:
Real-time, safety-critical systems MOST often use serial busses that:
Real-time, safety-critical systems most often require deterministic behavior to ensure tasks are executed reliably and within strict time constraints. Deterministic behavior allows for predictable and reliable communication, which is essential for the proper functioning of these systems. Deploying encryption on serial busses might introduce additional processing overhead and delays, adversely affecting the timing and predictability crucial for safety-critical operations. Hence, these systems typically prioritize deterministic behavior over deploying encryption.
For safety-critical systems, CAN is the most widely used communication protocol and does not have a built-in encryption mechanism. This prioritizes low latency and deterministic response times over encryption. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219335/
FoxTrotDG - from the article you linked: The CAN protocol uses a shared broadcast network without a built-in encryption mechanism. This allows an adversary to eavesdrop all the nodes and understand the communication. To prevent this data breach, a light-weight encryption system should be implemented. That points me to C.
btw...I HATE the question wording..."most often use"...that could lend itself to D as the nature of the CAN does not have built-in encryption (as your link indicates)...
from what I read online, the CAN bus is a broadcast network and isn't designed with encryption in mind. I was trying to tie CAN busses to safety critical systems and found 1 or 2 articles mentioning it. I was originally thinking C because encryption seems like a no brainer for mission critical applications or use cases, but apparently, no encryption (yet) on CAN busses
eal-time safety-critical systems require deterministic behavior to ensure that specific tasks are carried out within a defined timeframe. Serial busses that have deterministic behavior can guarantee that messages are sent and received at a predictable rate, which is essential for these systems to operate as intended. Additionally, security is also critical for safety-critical systems, and deploying serial busses with encryption provides an added layer of protection against unauthorized access, tampering, or data breaches.
Make up your mind Cock
Option D. Deploying encryption on serial busses may introduce additional processing overhead and introduce delays, which can adversely affect the timing and predictability of the critical systems. Therefore, safety-critical systems that use serial busses typically do not use encryption, as the need for predictable, deterministic behavior takes priority over data confidentiality.
Deterministic Behavior: Safety-critical systems require predictable and reliable communication to ensure that tasks are executed within strict time constraints. Deterministic behavior in serial busses ensures that data transmission occurs in a predictable manner, which is essential for the correct functioning of real-time systems. Encryption: While encryption is crucial for securing data, it can introduce latency and overhead that might be unacceptable in real-time, safety-critical environments. In these contexts, the focus is often on ensuring that data is transmitted accurately and timely rather than encrypted, to maintain the system's performance and reliability.
It's a serial bus, not a networked server. How much encryption is going on in the serial bus of the computer you're on right now? How much encryption happens between any two hardlinked components or machines? I'm not even sure modern laptops have any serial I/Os in them, but the point is that you don't need to encrypt non-networked pieces of your infrastructure. encryption would be overkill and generally counterproductive in a single-bit-at-a-time hardlined proprietary-safety-message-sendy-machine.
safety critical systems without encryption is insane. You would consider a different system and topology for a SAFETY CRITICAL system than using a CAN.
Deterministic means it contains a field that has info regarding message priority. Can bus is one such serial bus, and by default does not have encryption, although it can have.
Deterministic behavior is critical for these systems, as it ensures that tasks are executed in a predictable and reliable manner
c. i apologize. The answer is C