BS EN 50159:2010
– 3 – EN 50159:2010
Contents
Introduction .................................................................................................................................................. 5
1 Scope .................................................................................................................................................... 6
2 Normative references .......................................................................................................................... 7
3 Terms, definitions and abbreviations ................................................................................................ 7
3.1 Terms and definitions .................................................................................................................. 7
3.2 Abbreviations ............................................................................................................................. 12
4 Reference architecture ...................................................................................................................... 13
5 Threats to the transmission system ................................................................................................ 16
6 Classification of transmission systems .......................................................................................... 17
6.1 General ...................................................................................................................................... 17
6.2 General aspects of classification ............................................................................................... 17
6.3 Criteria for the classification of transmission systems ............................................................... 17
6.4 Relationship between transmission systems and the threats .................................................... 18
7 Requirements for defences ............................................................................................................... 18
7.1 Preface ...................................................................................................................................... 18
7.2 General requirements ................................................................................................................ 19
7.3 Specific defences ...................................................................................................................... 20
7.4 Applicability of defences ............................................................................................................ 26
Annex A (informative) Threats on open transmission systems ............................................................ 28
A.1 System view ............................................................................................................................... 28
A.2 Derivation of the basic message errors ..................................................................................... 29
A.3 Threats....................................................................................................................................... 30
A.4 A possible approach for building a safety case ......................................................................... 31
A.5 Conclusions ............................................................................................................................... 35
Annex B (informative) Categories of transmission systems ................................................................. 37
B.1 Categories of transmission systems .......................................................................................... 37
B.2 Relationship between the category of transmission systems and threats ................................. 39
Annex C (informative) Guideline for defences ........................................................................................ 40
C.1 Applications of time stamps ....................................................................................................... 40
C.2 Choice and use of safety codes and cryptographic techniques................................................. 41
C.3 Safety code ................................................................................................................................ 46
C.4 Length of safety code ................................................................................................................ 49
C.5 Communication between safety-related and non safety-related applications............................ 51
Annex D (informative) Guidelines for use of the standard..................................................................... 53
D.1 Procedure .................................................................................................................................. 53
D.2 Example ..................................................................................................................................... 54
Annex E (informative) Mapping from previous standards ..................................................................... 59
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives ................................ 62
Bibliography ............................................................................................................................................... 63
Licensed copy: Mr Wu Baohong, Atkins, Version correct as of 20/01/2011 06:30, (c) BSI
