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helo=mimir.eigenstate.org; client-ip=206.124.132.107 Received: from mimir.eigenstate.org (mimir.eigenstate.org [206.124.132.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tb-mx0.topicbox.com (Postfix) with ESMTPS for <9fans@9fans.net>; Fri, 12 Feb 2021 11:39:26 -0500 (EST) (envelope-from ori@eigenstate.org) Received: from abbatoir.fios-router.home (pool-74-101-2-6.nycmny.fios.verizon.net [74.101.2.6]) by mimir.eigenstate.org (OpenSMTPD) with ESMTPSA id 1330b7a2 (TLSv1.2:ECDHE-RSA-AES256-SHA:256:NO) for <9fans@9fans.net>; Fri, 12 Feb 2021 08:39:25 -0800 (PST) Message-ID: <2D3A48EAEE802802A4AA6CE3F80C0206@eigenstate.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable To: 9fans@9fans.net Subject: Re: [9fans] patches from 9front Date: Fri, 12 Feb 2021 08:39:23 -0800 From: ori@eigenstate.org In-Reply-To: MIME-Version: 1.0 Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: e199b998-6d50-11eb-bc11-e239d484246c Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UYzgyOTM5ZjFmZGEwZTQ3OS1NOWFiY2NmMWM5YzFlMTg5ZjNiOGZi?= =?UTF-8?B?Y2Q4Pg==?= List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M9abccf1c9c1e189f3b8fbcd8:1:wegvSHaPRG2BT03X73UT4uLrvOJefjhDCxZN_7Nfifg Quoth Eli Cohen : > well... I have a few questions already. I have heard that thorough > scrutiny of dp9ik would be appreciated as Ori said, and hasn't really > been done yet. I'm not sure that's an entirely accurate characterization of what I said. The protocol is still following p9sk1, but with an initial secret derived using a well understood password authenticated key exchange protocol (SPAKE2), and a complete replacement of DES with a modern AEAD cipher (chacha20-poly1305). More scrutiny is *always* welcome, but the algorithm used is well scrutinized outside of plan9, and put together in fairly well understood ways. As far as what exists in p9sk1: It's effectively broken. It was possible to decrypt 56 bit keys on $250,000 hardware in less than a day, back in 1998. Over 20 years ago. By 2006, the cost dropped to $10,000 or so. Today, there are commercial services like crack.sh, which claim 25 seconds for typical unsalted password (that's us!), going up to 3.5 days for a full brute force run. With GPUs, it'll probably within reach of a bored teenager soon, if it isn't already. ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Tc82939f1fda0e479-M9abcc= f1c9c1e189f3b8fbcd8 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription