From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 14E779C for ; Mon, 17 Apr 2017 01:29:04 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from cock.li (cock.li [185.100.85.212]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 4191918F for ; Mon, 17 Apr 2017 01:29:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU autolearn=ham version=3.3.1 MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cock.lu; s=mail; t=1492392537; bh=2Erqajmp6Jpfx2DrS0BXwmAD0qPHrfRM7UsruVtP8Ck=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=eXhdMDJl4PUY+0EiGouh/6ehcwSDbSJfag/5oIwtBod/7httqcFizfcVloLNvgXUY RMq8303gSYN3GKgEkMlRHDJYxyHlMUKEp2gLlQBQuQMGbgtI1A66SdSyjmXvNanfKp Es4lyWQ8YSl1bXX8IRcCbWE4soq8bu6PXG/PK61V+qB2wl8EuNcaHXGSecmVV11NLS HsOay59tuL5+qG7JYl9qLS+QFDpyDBvC6RPIENGRQI1QLW0+QL5OzMtywCibpZG673 gSjpURzNkdi885jlH5Sbn8emhL6k148PPfSasdrO0wj9sqkp36DtADXAQl1aDkf0OR gF+1KyoIOmnZw== Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Sun, 16 Apr 2017 22:28:56 -0300 From: bfd@cock.lu To: erik@q32.com, Erik Aronesty In-Reply-To: References: <0690791a46d7a7699fc3427e92a76e9b.squirrel@mail.fairluck.net> Message-ID: <461f7ce7a17c5765daadc461cdd3373c@cock.lu> X-Sender: bfd@cock.lu User-Agent: Roundcube Webmail/1.2.3 X-Mailman-Approved-At: Mon, 17 Apr 2017 02:08:01 +0000 Cc: Bitcoin Protocol Discussion Subject: Re: [bitcoin-dev] Malice Reactive Proof of Work Additions (MR POWA): Protecting Bitcoin from malicious miners 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: Mon, 17 Apr 2017 01:29:04 -0000 On 2017-04-16 17:04, Erik Aronesty via bitcoin-dev wrote: > This is a great solution. > > 8 or more secure hashes, each of which can be implemented on GPU/CPU, > but rotate through them - per block round robin. > > Hardware, infrastructue investment is protected. ASIC is not. > The write time for configuring a FPGA with a fresh bitstream is measured in tens of milliseconds. > ASIC will never beat this - because it will be 8x more expensive to > maintain the cold circuits. > Unused circuits don't consume power, which is the main cost in running a miner.