From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from arnowagner.info (mail.tansi.org [84.19.178.47]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 7E91817BA0 for ; Tue, 26 Nov 2024 08:45:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=84.19.178.47 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732610746; cv=none; b=VkhGR81zeJU9fRwpXmXdVeLv3D3cHSdmT4oW4apEO9YtqqL+ld9Lzs+OVVmcjDOghvzU2lzIjIhMNQ+6gkrHLU7VUlhrOXGC9jqt9upCiPYlpJO+/KgCX73bUJsfkxCD/0qyY7REHlWxGAuP8K4Cpa+/7TwznKLxDd0QrOFr8bc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732610746; c=relaxed/simple; bh=rvKk9hoUKgP59C8KdPWzQiNYVuyRTib7MqPgm82ng9k=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WlXien9hdOys4dQG3ss+KMmeEHPBVBZl9M43FnObUiML4mTbLPUYWuBvr3EKX7/ZQj/lPOPcPy+5Jhs7WHcXUcqRglqzntecinL5boadSKf629JpKCZkwHAM0WBdPhQ+9ysferMom6lR2AUh4yJ4irpxcgLvfZvfvsorJGxZbro= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=arnowagner.info; spf=pass smtp.mailfrom=arnowagner.info; arc=none smtp.client-ip=84.19.178.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=arnowagner.info Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arnowagner.info Received: from gatewagner.dyndns.org (81-6-44-245.init7.net [81.6.44.245]) by v1.tansi.org (Postfix) with ESMTPA id 8B9C614004F; Tue, 26 Nov 2024 09:38:29 +0100 (CET) Received: by gatewagner.dyndns.org (Postfix, from userid 1000) id EB2EF17AA7B; Tue, 26 Nov 2024 09:39:01 +0100 (CET) Date: Tue, 26 Nov 2024 09:39:01 +0100 From: Arno Wagner To: Patrick Callaghan Cc: "cryptsetup@lists.linux.dev" Subject: Re: LUKS and quantum computing Message-ID: Reply-To: Arno Wagner References: Precedence: bulk X-Mailing-List: cryptsetup@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: No idea. And frankly, I have stopped caring. "Quantum Computing" is a Fata Morgana that does not amount to anything practical at this time (after 50 years of resarch) and may well never amount to anything. It will certainly not be a real treat in the foreseeable future. Here is what Peter Gitman thinks of the topic, and I think it is spot on: https://www.cs.auckland.ac.nz/~pgut001/pubs/bollocks.pdf Regards, Arno On Mon, Nov 25, 2024 at 23:13:17 CET, Patrick Callaghan wrote: > If we use LUKS encryption with SHA-256 configured (i.e. the default), is > this considered safe against attacks by quantum computers?  > > I ask because NIST suggests SHA512 in general for quantum safe algorithms > (see "old Q17" in > https://csrc.nist.gov/projects/post-quantum-cryptography/faqs) and we want > to be LUKS quantum safe now and for several years to come, even if no > practical attacks currently exist. > > Note, the cipher we use is "aes-xts-plain64" so we have no question about > this as AES with 256-bit keys is considered quantum safe.  > > Thank you. -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@wagner.name GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- A good decision is based on knowledge and not on numbers. -- Plato If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier