3 ms·
At least it's only 12 more years until the patents on OCB3 expire. We're almost at the halfway point.
by beefhash 6y ago
At least it's only 12 more years until the patents on OCB3 expire. We're almost at the halfway point.
- bjoli 6y agoI tried reading the patents, and one is expired due to non-payment and the other expires (or rather: anticipated expiration) next year. How does the system work? Can Rogaway just revive that patent (which is the one valid longer)?
- beefhash 6y agoOh. I see what's going on, and I was wrong about this. US7949129B2 expired because he didn't pay the patent fees. US8321675B2 claims priority to a patent from 2001. Claiming priority is a way to broaden an existing patent by saying “it's this, but improved”; however, this also means inheriting the expiry date of the patent claiming priority to. So yeah, that one's expiring next year already. Holy cow, thanks for making me check. Another, related patent that he notes in the FAQ[1] is 8,107,620, which won't expire until 2029 unless IBM forgets to pay patent fees. Hard to tell if it really applies to OCB3 though. [1] https://www.cs.ucdavis.edu/~rogaway/ocb/ocb-faq.htm#patent:phil https://www.cs.ucdavis.edu/~rogaway/ocb/ocb-faq.htm#patent:p...
- bjoli 6y agoThe Jutla patent would apply to any AEAD scheme, and I haven't heard about IBM hunting AES-GCM users. So, 2021 might be the year! Edit: I was incorrect about the Jutla patent. It seems to only apply to patents that are CBC- or ECB-like. GCM should be fine.