David-Sarah Hopwood wrote: [snip] > There could also be a concern that point 4 above is similar to > on-line/off-line signatures as patented by Even, Goldreich and Micali > (U.S. patent 5016274, filed in 1988; expires on 14 May 2011).
Ah, I calculated the expiration date incorrectly. It was filed before the rules changed in June 1995, so it's the later of 20 years after filing (8 November 2008) or 17 years after issue (14 May 2008). So it has already expired. -- David-Sarah Hopwood ⚥ http://davidsarah.livejournal.com
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