Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 545EE1A59 for ; Thu, 4 Apr 2019 02:49:44 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from zinan.dashjr.org (zinan.dashjr.org [192.3.11.21]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id EF8A87ED for ; Thu, 4 Apr 2019 02:49:43 +0000 (UTC) Received: from [2001:470:5:265:a45d:823b:2d27:961c] (unknown [IPv6:2001:470:5:265:a45d:823b:2d27:961c]) (Authenticated sender: luke-jr) by zinan.dashjr.org (Postfix) with ESMTPSA id 7B4BC38A0D8B; Thu, 4 Apr 2019 02:48:46 +0000 (UTC) X-Hashcash: 1:25:190404:bitcoin-dev@lists.linuxfoundation.org::rwKHnQ+UiF2Aa4Wi:cUDye X-Hashcash: 1:25:190404:ethan.scruples@gmail.com::cQGMouuR5pR4N87T:Kk/A X-Hashcash: 1:25:190404:dev@jonasschnelli.ch::DAw00V5x6ys8wL8l:blbzu From: Luke Dashjr To: bitcoin-dev@lists.linuxfoundation.org, Ethan Scruples Date: Thu, 4 Apr 2019 02:48:33 +0000 User-Agent: KMail/1.9.10 (enterprise35 0.20100827.1168748) References: <816FFA03-B4D9-4ECE-AF15-85ACBFA4BA8F@jonasschnelli.ch> In-Reply-To: X-KMail-QuotePrefix: > MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <201904040248.34162.luke@dashjr.org> X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org X-Mailman-Approved-At: Thu, 04 Apr 2019 05:05:16 +0000 Subject: Re: [bitcoin-dev] assumeutxo and UTXO snapshots X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Apr 2019 02:49:44 -0000 On Wednesday 03 April 2019 15:39:29 Ethan Scruples via bitcoin-dev wrote: > If we can get mandatory UTXO commitments soft forked into Bitcoin, we get > the advantage of a non-growing IBD, No, we don't. This is exactly the danger. UTXO snapshots are NOT an alternative to a real IBD. There are HUGE security implications for this. Frankly, the danger that someone would do such a thing is itself a good reason not to ever add UTXO commitments. Luke