[Cfrg] The R in CRS

Watson Ladd <watsonbladd@gmail.com> Wed, 27 March 2019 12:29 UTC

Return-Path: <watsonbladd@gmail.com>
X-Original-To: cfrg@ietfa.amsl.com
Delivered-To: cfrg@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C79241202AF for <cfrg@ietfa.amsl.com>; Wed, 27 Mar 2019 05:29:34 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.999
X-Spam-Level:
X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zVfvPTdAZydP for <cfrg@ietfa.amsl.com>; Wed, 27 Mar 2019 05:29:33 -0700 (PDT)
Received: from mail-lj1-x22f.google.com (mail-lj1-x22f.google.com [IPv6:2a00:1450:4864:20::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 42C621202AA for <cfrg@irtf.org>; Wed, 27 Mar 2019 05:29:33 -0700 (PDT)
Received: by mail-lj1-x22f.google.com with SMTP id k8so14192867lja.8 for <cfrg@irtf.org>; Wed, 27 Mar 2019 05:29:33 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=8aS86JuVqZNmOLYuWejm15pzGD4pqeyzAuJ/wSh41PY=; b=JmUno6/rPHzsoq072uippdFmyzMHTemkEEEuE20OX/GuwbWQtlywhl0emI7MxuK9Z6 ZxgX8qT43jPTQ4SeocjhMwJNmgWf302hAODQcInvn9MGGU+Ry/R7ZeN/BoPrvkPX8Pkm 9WFB+9ky83JJ5UT3tA/JVz2+qlzn7V136d8YCEtZIXWxll1mthmGDP7dXpUag8Jzj8nB mxbN1GD0C8S0b9zfKstSALjN9OUoPjKekBvucTttttmC2v7/3BjZjBrPqh8w8MhTcj+h d3TohPCzYlHNBrBYicGLcMJuXEr9cMVPt+rDUD22Ne9ToJmM7NHRXWyXsB2D3rJ7MplQ jaFQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=8aS86JuVqZNmOLYuWejm15pzGD4pqeyzAuJ/wSh41PY=; b=BCKIa0yE64zu/tGLIijoS14+waQCqEwCvpCbYR+CwjVZr46E0EhmxdFTVJ1c9RXC+k RItj+vGxtUnA0aKHaWeGSqVbpyX6H7AV2m79mwB5gqXmPCgQjzAd8PUQkhwsBtbOmLMv GqG4vMjf6NMELnMywk4AybLOfzOf1odbSgpusphB9JrA1DnCJpYXG0GDXaLERSN140E2 pT97K1RpwOHCwv6PoouA/6kgvTbAthACcG3hShA4B3Z2i4g9RV9c+3usHQz9yvNHu01H 6KnaWXEFNI1lgN9AQoEn64oJmUyFzE6NEJq2atkwE8OkByapvBhxTCDcmjtfM7tGVY/Z L8Mg==
X-Gm-Message-State: APjAAAW90kjAempsB/4BqlpSkrMYCcrd/87LlMrOWkzZqoPqNfuGa9no Wd+lwTy1vxEh1EyBAapGI/K/KveZJ9Sj48ooU5b7k+e5
X-Google-Smtp-Source: APXvYqwxr/svYm8c1wXotErsPjqGNWkI1UpuwiJx9fWu01YLxgAcgbCsAcsfd9p+Ozh/Ufh/AAfHQng/SMHagTTfXUc=
X-Received: by 2002:a2e:7007:: with SMTP id l7mr1214373ljc.101.1553689771053; Wed, 27 Mar 2019 05:29:31 -0700 (PDT)
MIME-Version: 1.0
From: Watson Ladd <watsonbladd@gmail.com>
Date: Wed, 27 Mar 2019 13:29:18 +0100
Message-ID: <CACsn0cm_aD5mk3Ha7BSOUJ94TOeCQPOLdKgBmJqwHoJwvJmfqg@mail.gmail.com>
To: CFRG <cfrg@irtf.org>
Content-Type: multipart/alternative; boundary="000000000000e517b80585129617"
Archived-At: <https://mailarchive.ietf.org/arch/msg/cfrg/54HSRH-k7Y_GhlbHzyToFHwvXk0>
Subject: [Cfrg] The R in CRS
X-BeenThere: cfrg@irtf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Crypto Forum Research Group <cfrg.irtf.org>
List-Unsubscribe: <https://www.irtf.org/mailman/options/cfrg>, <mailto:cfrg-request@irtf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/cfrg/>
List-Post: <mailto:cfrg@irtf.org>
List-Help: <mailto:cfrg-request@irtf.org?subject=help>
List-Subscribe: <https://www.irtf.org/mailman/listinfo/cfrg>, <mailto:cfrg-request@irtf.org?subject=subscribe>
X-List-Received-Date: Wed, 27 Mar 2019 12:29:35 -0000

Dear all,

There is a difference between a common reference string that requires
trusted setup and a common random string where for instance the ROM implies
security.

SPAKE2 or any protocol with random group elements doesn't need a trusted
setup, just a random string. I'm sure this holds for others.

Sincerely,
Watson