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FWIW - ARINC429 is a common one way serial bus used in commercial aviation.
by gte525u 3y ago
FWIW - ARINC429 is a common one way serial bus used in commercial aviation.
- closewith 3y agoThanks for this comment. It seems that ARINC 429 has been replaced by ARINC 644 in most new aircraft. From reading the Wikipedia article, they are indeed logically one-way (although the underlying protocol involves two-way communication). It has no security at all. However, it seems that communication between any avionics systems and anything user-accessible goes through a Network Extension Device (NED). These are required to either be physically (not only logically) unidirectional _or_ have built-in security. So it might be physically impermeable or it might be a buggy 10-year old firewall. Doesn't exactly inspire confidence given the subject of the article.