Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 0A154B37 for ; Fri, 5 May 2017 11:24:51 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com [66.111.4.28]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 21E96146 for ; Fri, 5 May 2017 11:24:49 +0000 (UTC) Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailout.nyi.internal (Postfix) with ESMTP id 5DC382074E for ; Fri, 5 May 2017 07:24:49 -0400 (EDT) Received: from web3 ([10.202.2.213]) by compute2.internal (MEProxy); Fri, 05 May 2017 07:24:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-sender :x-me-sender:x-sasl-enc; s=fm1; bh=HTS092Tm0soaW0h7ruqFCaFfqLhzF SNvOILPydkzNao=; b=cMZGslJRwb9UnMUZeCMV6YjqbqxFTy+fDWoktIVBlURSk ZGMxTgOYWuvqo2KlxkKTK7XlDUKT6+N8Z/4tkcGV9JGNcTOwvUoIMaj5B5vMy30O RZRv8rMWBDpEKovABjakdZfIdH+VJJnsfgwFKcZHK+6UfwiIOpu0CcCXpeG9eh81 NcL7Bvc6iqDb91G7bDRgTTcp6zErkw1Ue/viN1f2aH0SPThu4kKb4/dfuaMhaYPX XV616eq17ulpdGKTiPY4Sgw5TjfnQJ0/BTygSmTFg+dMEOTA7W6guMP7jEDPjutx +4Ca1ZcuGY5nTFmGg8/GDp2W0j2f3SMm8KC7qIH9g== X-ME-Sender: Received: by mailuser.nyi.internal (Postfix, from userid 99) id 3C8C99E758; Fri, 5 May 2017 07:24:49 -0400 (EDT) Message-Id: <1493983489.1448140.966773912.17FBAAC0@webmail.messagingengine.com> From: Tomas To: bitcoin-dev@lists.linuxfoundation.org MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" X-Mailer: MessagingEngine.com Webmail Interface - ajax-6cc55fe1 Date: Fri, 05 May 2017 13:24:49 +0200 X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_LOW 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: Fri, 05 May 2017 13:00:27 +0000 Subject: [bitcoin-dev] Non-confirming block signalling 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: Fri, 05 May 2017 11:24:51 -0000 I propose a method to mark blocks to indicate that they were generated without verifying the previous block. This can be done by using a bit of the version field. This would counter the reduction of security caused by what is known as "SPV-mining". The BIP is here: https://github.com/tomasvdw/bips/blob/master/bip-non-confirming-block-signalling.mediawiki Tomas bitcrust