Deciding whether to use OCB sounds like a job for CFRG!
As I understand it, OCB2 is severely broken: https://eprint.iacr.org/2019/311 That said, OCB1 and OCB3 may be just fine, but a broken OCB2 is not a good sign. All the more reason to defer to CFRG, unless you want to play Monty Hall problem. Dan From: IPsec <ipsec-boun...@ietf.org> On Behalf Of Dan Harkins Sent: Wednesday, March 3, 2021 2:37 PM To: ipsec@ietf.org Subject: Re: [IPsec] [Cryptography] Direct public confirmation from Dr. Rogaway (fwd) Faster and more secure seem to be compelling reasons. Those reasons are probably more compelling for ESP than they are for IKE. The license for OCB always had some caveats like the code could not be used for military purposes which is something of a nightmare for a manufacturer of general purpose hardware/software. Considering how difficult it would be to ensure that your product is never used by a military anywhere in the world, that's probably enough of a reason for TLS to not support it. Remember how long ECC was delayed for (imagined) IP reasons? IP is bad news. People don't want anything to do with partially encumbered technology. Now this technology is not encumbered at all so, yea, let's do it. If an individual draft was to appear would the WG adopt it as a work item? regards, Dan. On 2/28/21 1:47 PM, Yoav Nir wrote: IIRC the license has allowed OCB to be used for TLS for several years. They haven’t taken it up. There are no AES-OCB ciphersuites inhttps://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-4 So I’m wondering right with you: It has a theoretical advantage in security and a measurable advantage in speed in software. Neither were compelling enough for anyone to bother adding it in TLS ciphersuites. Why should our conclusion be any different? Yoav On 28 Feb 2021, at 22:35, Paul Wouters <p...@nohats.ca <mailto:p...@nohats.ca> > wrote: So now that OCB is finally free, do we want to implement it? :) I'm honestly not sure if the improvements of AES-GCM are worth it. I haven't heard of vulnerabilities in IKE/ESP wrt. IVs or counters. Paul ---------- Forwarded message ---------- Date: Sat, 27 Feb 2021 14:37:30 From: "Salz, Rich via cryptography" <cryptogra...@metzdowd.com <mailto:cryptogra...@metzdowd.com> > To: "cryptogra...@metzdowd.com <mailto:cryptogra...@metzdowd.com> " <cryptogra...@metzdowd.com <mailto:cryptogra...@metzdowd.com> > Subject: [Cryptography] Direct public confirmation from Dr. Rogaway https://mailarchive.ietf.org/arch/msg/cfrg/qLTveWOdTJcLn4HP3ev-vrj05Vg/ <https://urldefense.proofpoint.com/v2/url?u=https-3A__mailarchive.ietf.org_arch_msg_cfrg_qLTveWOdTJcLn4HP3ev-2Dvrj05Vg_&d=DwMDaQ&c=yzoHOc_ZK-sxl-kfGNSEvlJYanssXN3q-lhj0sp26wE&r=qkpbVDRj7zlSRVql-UonsW647lYqnsrbXizKI6MgkEw&m=2DcLjYKtazJ6kYTZx5uowgB-qJRp6_C8W0rBOr7ZOUI&s=LZV-8STdDDeui1TmXz2JORn2wTtSrkJa_-l3hZK-AO8&e=> : I can confirm that I have abandoned all OCB patents and placed into the public domain all OCB-related IP of mine. While I have been telling people this for quite some time, I don't think I ever made a proper announcement to the CFRG or on the OCB webpage. Consider that done. I hope people will use the scheme to do positive things. phil _______________________________________________ The cryptography mailing list cryptogra...@metzdowd.com <mailto:cryptogra...@metzdowd.com> https://www.metzdowd.com/mailman/listinfo/cryptography <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.metzdowd.com_mailman_listinfo_cryptography&d=DwMDaQ&c=yzoHOc_ZK-sxl-kfGNSEvlJYanssXN3q-lhj0sp26wE&r=qkpbVDRj7zlSRVql-UonsW647lYqnsrbXizKI6MgkEw&m=2DcLjYKtazJ6kYTZx5uowgB-qJRp6_C8W0rBOr7ZOUI&s=_9IPM1exZqE6F4PLBAvpqDF-bHkBi5JPiUyq3eeyfwo&e=> _______________________________________________ IPsec mailing list IPsec@ietf.org <mailto:IPsec@ietf.org> https://www.ietf.org/mailman/listinfo/ipsec <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_ipsec&d=DwMDaQ&c=yzoHOc_ZK-sxl-kfGNSEvlJYanssXN3q-lhj0sp26wE&r=qkpbVDRj7zlSRVql-UonsW647lYqnsrbXizKI6MgkEw&m=2DcLjYKtazJ6kYTZx5uowgB-qJRp6_C8W0rBOr7ZOUI&s=B4s3eO4jZ5UhqwAPEQu9SxQaSVWKuM4HcC1moozCyBc&e=> _______________________________________________ IPsec mailing list IPsec@ietf.org <mailto:IPsec@ietf.org> https://www.ietf.org/mailman/listinfo/ipsec <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_ipsec&d=DwMDaQ&c=yzoHOc_ZK-sxl-kfGNSEvlJYanssXN3q-lhj0sp26wE&r=qkpbVDRj7zlSRVql-UonsW647lYqnsrbXizKI6MgkEw&m=2DcLjYKtazJ6kYTZx5uowgB-qJRp6_C8W0rBOr7ZOUI&s=B4s3eO4jZ5UhqwAPEQu9SxQaSVWKuM4HcC1moozCyBc&e=> -- "The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane." -- Marcus Aurelius ---------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. 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