Protecting and verifying, that the integrity remains intact, of data stored and exchanged in electronic systems, has been researched for decades. That data has evolved to include the embedded machine-code, previously restricted to loading at depots or in controlled environments. This paper presents tabulated information to aid in the specification of a Cyclic Redundancy Check (CRC) code algorithm requirement, by matching it to a safety assurance level. In addition, there is a discussion about using a legacy technique to verify a field-loaded, machine-code. Bounds on shortened and/or natural block length codes for 16-bit and 32-bit CRC algorithms found in research, such as, the probability of an undetectable error for a known bit-error rate and error pattern are given. For unknown error rates, there are references to some previous research techniques.
Choosing a CRC & specifying its requirements for field-loadable software
2008 IEEE/AIAA 27th Digital Avionics Systems Conference ; 5.C.6-1-5.C.6-9
2008-10-01
474786 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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