Rich, Respectfully, I have to disagree. ISO 14119, Safety of machinery — Interlocking devices associated with guards — Principles for design and selection, specifically addresses defeat resistance in interlocking devices. This is vital, since defeat resistance is an important aspect of designing and installing interlocking systems.
Doug Nix d...@mac.com +1 (519) 729-5704 "It is not only for what we do that we are held responsible, but also for what we do not do." Molière > On 9-Apr-19, at 14:04, Richard Nute <ri...@ieee.org> wrote: > > > Standards need not – indeed should not -- address nefarious activity on the > part of the user. And, standards need not address tampering (defined > previously) as there can be no end to the extent of tampering. The > requirement for “tamperproof” is beyond the scope of safeguarding a user > through applications of safeguards against energy sources. > > Rich > > > From: John Allen <john_e_al...@blueyonder.co.uk > <mailto:john_e_al...@blueyonder.co.uk>> > Sent: Tuesday, April 9, 2019 1:11 AM > To: ri...@ieee.org <mailto:ri...@ieee.org> > Cc: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> > Subject: RE: [PSES] Tamper-proof Hardware > > Rich > > Thanks for laying out the main definitions of “tamperproof”, and for your > view on why my “story” is not an example thereof (it was only the one that I > had “to-hand” at the time, and there must be many others J) . > > Maybe, therefore, similar definitions/explanations should have been included > in IEC 62368, so as to make it (much!) clearer to designers and > testing/certification personnel as to the intent of the requirement because > (obviously) there can be a considerable spread of interpretations of the > requirement - or else John Cochran (and probably many others!) would not ask > the question. > > As it stands, that “requirement” must thus be considered to be “ambiguous” at > best, and therefore shouldn’t have been included in a standard in that form > (I’m sure there must be a word to describe a definition with four different > possible interpretations, but I’m afraid I don’t know it and thus “ambiguous” > is the best that I can offer ATM!). > > In fact, given the definitions you quote, I would suggest that the term > should NOT have been included in the standard at all because they imply the > likelihood of various levels of intentional interference/criminality on the > parts of possible perpetrators. However, it should not have been the intent > of the 62368 standards-writing teams to address such issues - maybe YES if it > were in a theft/ building-intrusion/ forgery prevention (etc.) standard, but > NO in a broadly-targeted product safety standard. > > John E Allen > W. London, UK > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <emc-p...@ieee.org <mailto:emc-p...@ieee.org>> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > <http://www.ieee-pses.org/emc-pstc.html> > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ > <http://product-compliance.oc.ieee.org/> can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > <http://www.ieee-pses.org/listrules.html> > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org <mailto:sdoug...@ieee.org>> > Mike Cantwell <mcantw...@ieee.org <mailto:mcantw...@ieee.org>> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org <mailto:j.bac...@ieee.org>> > David Heald <dhe...@gmail.com <mailto:dhe...@gmail.com>> > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
