Simon Josefsson wrote:
Sam Hartman <hartmans-ietf(_at_)mit(_dot_)edu> writes:
"Simon" == Simon Josefsson <simon(_at_)josefsson(_dot_)org> writes:
Simon> This document appears to have a normative reference to a
Simon> patent:
Simon> [LUHN] Luhn, H., "Luhn algorithm", US Patent 2950048,
Simon> August 1960, http://patft.uspto.gov/netacgi/nph-
Simon> Parser?patentnumber=2950048.
Simon> I cannot find a patent disclosure about this on file with the
Simon> IETF:
Simon>
https://datatracker.ietf.org/ipr/search/?option=document_search&document_search=draft-ietf-keyprov-symmetrickeyformat
Simon> I believe the authors should file a patent disclosure about
Simon> this in order to comply with the spirit of RFC 3979 section
Simon> 6.1.3.
Simon, I'm not sure what the letter of that BCP says, but I think the
spirit of the requirements is that we should have disclosures regarding
any IPR that may pose concerns for implementation.
As far as I can tell, this is an August 1960 patent. It's old enough
that no license is required. I do not see any concerns this poses.
Am I missing something.
I did not notice the date.
More worrisome, I cannot read the reference. The link goes to a page
which says 'Full text is not available for this patent. Click on
"Images" button above to view full patent' and when I click on "Images"
I get nothing because the page appears to require some non-standard
plugin that I don't have installed.
This is a bad reference in both this document and the one I copied it
from, draft-ietf-keyprov-pskc. We both need to point to something else.
Wikipedia says that the LUHN algorithm is in "ISO/IEC 7812-1:2006
Identification cards - Identification of issuers - Part 1: Numbering
system." As soon as I can confirm this (a bunch of searches seem to
indicate that it is in that standard), I'll update the reference to the
ISO standard. I'll need to check on whether we need to submit something
about the patent - it was published in 1960.
spt
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