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发布时间:2024-09-21 06:00

/ 廪ѧϵʿ

رҵķб¹һƪڱر㷨ġĽƪģܱرҵѧ

رǽڴעĿ֮һرҲҪ֧ţֱӰP2PûѧЭ֮ϡھѧϣʵ˹Ү룺ͨӦгãʤ̭ѧϣֻظ֧⡣ѧϣѾʼγȫ̬Ȧδѧϣṩ¿ԺͷչͨP2Pγȫó׵ġȨϵһЩͨ쳣صĹҳֻͨҾе󣬿ܴȽȫó׵óɱ

б(Satoshi Nakamoto)ڴرʱҪ⣺  

һȷϣûP2PЭ飬ֹҵظ֧(ֹٱ)

ڶرҵķС

رϵͳܶ⹥ͨобϹڱرҵסرңP2Pֽϵ(Bitcoin: A Peer-to-Peer Electronic Cash System)ǿԷ֣бƵıرңͨڿ󡢼ˡӶһʯ񡱵ؽ⡣

廪ѧѧרСƽڽܣرҵķ(׳ơڿ)ǽSHA-256ϵͳ֮ϵġSHASecure Hash Algorithmд˼ǻڹϣ(Hash)㷨ļϵͳͨSHA-256ѧϵͳչʾбϽķ˼·

ϣһּ㷨һдΪh=hash(m)hϣֵmӦϣֵĽ(message)ϣص㣺һ֪mͨh=hash(m)֤ӦĹϣֵhѣ֪ϣֵҪӦĽmѡڹϣIJԳԣ˵ԣرʺΪѧáϣֵʺϵܵġԿȫǼʹõ˹ԿҲһġ˽ԿҲǹϣĽmǷ֪˽Կmȴ֤ӦĹԿǹϣֵhνԳƼ㷨

ϣĵڶǣ⡱(˽Կ)вͬôӦĹϣֵͻкܴͬѩЧӦ(avalanche effect)ϣеԣ֤˲ͬ˽Կ(ֻһ)ͶӦĹԿ죡

һǿ˽⣺SHA-256ǻʮλƵļϵͳҲÿһλʮرҵIJͬϢһʮֺǰӢĸʾ0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,fԣҪǿһʮλĹϣֵHash:00000000000000004cf3aa249551432fa84da4de05e9cfc3e6d95a5ce8bed5f7DZر2014-02-08T 03:06:30ʱ䣬ڳһر(block)ӦĹϣֵҪ֣

֮ԽSHA-256Ϊϣֵ64λÿһλʮҲǶĴηѡܵĹϣֵͿ2256ηء

֣бϰSHA-256㷨ѡΪرҵڿ㷨Ϊϣֵǰÿһ㣬ѰmѶȾͻӶĴηΪSHA-256ûСƽڵSHA-1ƽ⣬κһʮλĹϣֵҪҵmûй̶㷨ֻܿhashײһڿÿٴhashײ䡰Ĵλдhash/s,ν֤POW(Proof Of Work)

ǻSHA-256ʮλƵļ㷨бԭʼıرд֤̰ɨSHA-256Ĺϣɶٸ0ͷÿһ0ƽָӣǶĴη˶ٸǶٸĴηһĹӣЩڽһϣ(Ҳһر)еõ֤

رϵͳǿڿĹϣֵǰڱҵȫӣͨڹϣֵǰ֤ƽÿʮÿĿǰֻڳ25(ǰÿʮ50)󹤣Ȼ˵ڶ⣬رҷе⡣

ôرѧڿϵͳֹظ֧أǿЩڿ󡱵ļͬʱˡ͸ʱ(time stamp)ÿʮڳһ飬¼ʮȫıرҽ׺͸ÿһ׸ʱÿһʽױͨȫĽڵ(node)ȷϣϷףһӴļ˺͸ʱϵͳ֤ظ֧IJ(ΪÿʱҪٴν֮ǰЩرû֧ŻϡҲ֤ԭرҳ޷֧˴ν֮ĵˡ)ԣرϵͳġڿ󡱣ȱ֤˱رҵУҲ֤ļˣӶظ֧Ŀܡν󹤡ͬʱҲӦýмԱرǵȵ2040رҴ󲿷ѾڳǵĹҪȡ׷ѡʱǾ͸ӦñΪԱˡ

⣬رϵͳܶ⹥⣬бôƵأʵ󹤡ڱر绹һҪĹܾǡбıرϵͳЭ飬ȫ51%ˣпܹرϵͳظ֧(Ҳٱ)ݱرڿʿ͸¶ǰɱÿά1G hash/sԼҪ240Ԫңڱرȫɱ9.6ԪDZرϵͳĻҲмֵ֧š(/ 廪ѧϵʿ)

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