From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.9 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 262621F619 for ; Thu, 12 Mar 2020 18:06:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726554AbgCLSGy (ORCPT ); Thu, 12 Mar 2020 14:06:54 -0400 Received: from mail-qk1-f177.google.com ([209.85.222.177]:47042 "EHLO mail-qk1-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726414AbgCLSGy (ORCPT ); Thu, 12 Mar 2020 14:06:54 -0400 Received: by mail-qk1-f177.google.com with SMTP id f28so7760640qkk.13 for ; Thu, 12 Mar 2020 11:06:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=google; h=date:from:to:cc:subject:message-id:mail-followup-to:references :mime-version:content-disposition:in-reply-to; bh=eZIbx8hwle18njBnIWJtc9Oh4S0jQVmUo5sJdNJJr5E=; b=a4TkbcH2d54s7Imv/dAYar1Y+3aNqpCOU1S9iQrjzYIYx83xCQUryHK42yVA+MKSZ+ ibBuCuY9KTc+eY8SQ7mb4nsJAoYzCTh1EjPxztJtLoOtltm9PkMsRiIRrc+deLYL+hts 3VIO5FmVVbWE8ZGvhqeGsuV6Tt0pZF2VAca/s= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id :mail-followup-to:references:mime-version:content-disposition :in-reply-to; bh=eZIbx8hwle18njBnIWJtc9Oh4S0jQVmUo5sJdNJJr5E=; b=YCgR39KtzdBzOXsRNNM8fvKbI1o67veJBC/K42KfttWdTNLbbQw5ZTrcehTmCkogm/ uG9Oiay1w+nLg8lI+lWmqMaHSMHDQumnUlUYJjfzT1g2gD3JbkXhJq6HrFYTyFYRbLJd qhsBx3VKN5GbzS5uNTHK1v3A2HspxzCRNGUHfOQRQxBYNkraM4/VZU/mnFb98YksIfd9 2p7A3MZQNsbsvGC7TYwyRD653rlmObZn71wsyEVEU0+sVcDS9gzbDv71eyuCnyziPE94 Ir7jvX3yD00tKRxxqEuteqY0IZ7Q2u8ctnAi+C8SPOmRQB46nqE28TLUc18baQ7Fm82C RCCw== X-Gm-Message-State: ANhLgQ2xLlFBURLpdMILJOlnfwrXH0rkyLmiPAoEpfq7g9LtU3UpBCEm dtnpfL18W/Sy6p8fuKCzUZBBynloqZwi6Q== X-Google-Smtp-Source: ADFU+vur2Aq02LYR8+LYa9XAUIAf2adJLjxaVGa5jDvP+2omXrfn665hv5XcjqDbroj056BQtRw3aQ== X-Received: by 2002:a37:2fc3:: with SMTP id v186mr9059944qkh.311.1584036413310; Thu, 12 Mar 2020 11:06:53 -0700 (PDT) Received: from chatter.i7.local (107-179-243-71.cpe.teksavvy.com. [107.179.243.71]) by smtp.gmail.com with ESMTPSA id z11sm10073054qti.23.2020.03.12.11.06.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Mar 2020 11:06:52 -0700 (PDT) Date: Thu, 12 Mar 2020 14:06:51 -0400 From: Konstantin Ryabitsev To: James Ramsay Cc: git@vger.kernel.org Subject: Re: [TOPIC 3/17] Obliterate Message-ID: <20200312180651.yonj6wzuatur25w6@chatter.i7.local> Mail-Followup-To: James Ramsay , git@vger.kernel.org References: <5B2FEA46-A12F-4DE7-A184-E8856EF66248@jramsay.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5B2FEA46-A12F-4DE7-A184-E8856EF66248@jramsay.com.au> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On Thu, Mar 12, 2020 at 02:57:24PM +1100, James Ramsay wrote: > 8. Jeff H: can we introduce a new type of object -- a "revoked blob" if you > will that burns the original one but also holds the original SHA in the ODB > ?? > > 9. Peff: what would this mean for signatures? New opportunity to forge > signatures. Easy, you just quickly find a collision for that blob's sha1 and put that in place of the offending original. ;) (Fully tongue-in-cheek.) -K