比特币爆破之际尝试说说对区块链的理解

　

1. 历史上科技泡沫的爆破和影响

铁路

　

影响：170年后的今天，铁路依然蓬勃发展，对生活的影响越来越大

　

电信

17年后的今天，当年的基础对今天社会速度距离成本的影响越来越明显

　

2. 比特币／区块链的数学基础：非对称加密

加密

　

e是大众知道的，加密就是c=m^e.　 知道c和e要破解d/m是一个很复杂的数学问题，只能用满天撒网一个个去试才可能试出来。获取比特币的过程大致等同用电脑（耗费电，人力。。。）去破解d/m，而且这个d/m要是之前别人没破解出的。

　

验证

　

d是大众不知道的，签名就是s=m^d，别人不知道d不能签名.　 验证等同看m是否等于s^e=(m^d)^e, s/e/m都是大众知道的，大众都可以验证。知道s／e／m要破解d是一个很复杂的数学问题, 所以他人很难产生一个假的m和对应可验证的s。

https://chrispacia.wordpress.com/2013/09/07/bitcoin-cryptography-digital-signatures-explained/

　

验证应用例子-Civic，5天前上线，估计以后信用卡公司会大量使用

　

So, what’s so special about Civic and how does it work? We’ve been developing a new type of authentication service, called ChainAuth, which uses the Bitcoin Blockchain to validate your identity credentials—your personal information is never stored on the blockchain, but we utilize the cryptographic infrastructure to ensure that the data on your device is never changed or compromised.

Basically, Civic validates your personal information and identity, stores it on your mobile phone and only you can see or use that information. It is never stored on our servers!This means that if Civic was to ever get hacked, your information would never be released because we just don’t have it.

Now that your information is secured on your device (and backed up to whatever backup provider you use for your phone), you can use this information to do any of the following:

Open new accounts with banks & other institutions, or just websites & apps. Private signups to sites and apps (they can let you signup without taking ANY personal information) Store your cryptographic keys and any other personal information, like health records, etc Generate digital ID’s and passports (eventually, once governments start accepting Civic)

Websites and apps that accept this information from Civic can be assured that you are a real person, and that any information transferred is fully verified—which reduces fake accounts, fraud and even trolls.

https://vinnylingham.com/civic-enabling-the-future-of-privacy-digital-security-with-chainauth-b79d61904d4c