一直以来有写日记的习惯，迫于对丢失的担心，我的日记从来不写在实物介质上，再者，日记又不是什么有价值的东西，故经常记载在类似有道云笔记的云笔记应用中，但是万一有道倒闭了呢，或者是哪天数据库被误删导致日记丢失。暑假接触了GitHub这种代码托管服务网站，被微软收购且有强大的社群力量让我相信如果我的日记上传到GitHub中日记就在这个开源仓库中永存，间接实现了思想的永存，后世若有某人无意间打开我的代码仓库，读到md文件，也会认识我这个人吧。
GitHub确实是一种对抗数据丢失的好办法，但是github倒闭或者删库的概率也是存在的，众所周知，避免数据丢失的最好办法是将数据多备份。备份在多个存储网站里？不失为一种办法，可是成本太高。多存在几个存储介质里？那成本还不如存在存储网站中呢。于是乎一种既节省成本又节省带宽的技术诞生了，这就是p2p。
P2p已经不是什么新鲜的东西，如果把文件比作生物，那么合法合规的文件就是合法公民，可以在网络中随意传输复制增殖，很多不合规但受人欢迎的小道文件，就像逃犯一般只能在小道里例如p2p网络中相互流传得以生存下去。于是问题出现了，诸如密码、日记、聊天记录这类合规却对别人没有价值的东西，有人愿意去存储吗？
是呀，有价值的东西才会有人去存储。那价值又从何而来呢？对了，因为共识，若大家都认为这个东西有价值，那它便真有了价值。猴子不会允许任何人用黄金交换它手中的香蕉，因为在猴子的眼里黄金是不具有价值的。我们当然不是猴子，但是当十年前一位名叫中本聪的人类拿着“比特币”企图向我们换取黄金的时候，我们也是拒绝的。
无论比特币的前身如何，这种点对点的电子现金的价值现在已经被人们承认并且发展出以以太坊为首的第二代区块链网络。矿工们为它们做着无意义的记账工作以换取有价值的加密货币。机会出现了，矿工拥有比特币是由账本决定的，所以他们需要进行记账以保证自己的利益，账本就像是一个分布式的超大数据库，在这个数据库里的信息是被全网所公认的。

Etherenum区块浏览器里的地址
其中一笔转账的记录
既然通过我的地址即可查到我的所有转账，并且基于智能合约的转账请求可以在inputData里备注信息，那么，我是否可以将非对称加密之后的信息放在inputData里呢？好像也不难吧。
一名北大学生在交易记录中存储信息
https://etherscan.io/tx/0x2d6a7b0f6adeff38423d4c62cd8b6ccb708ddad85da5d3d06756ad4d8a04a6a2
选择以utf-8格式编码

原文如下：

0x<UTF-8>
Peking University teachers and classmates:
How are you!
I am Yueluo from the 2014 Foreign Languages Institute. I was one of the eight students who submitted the “Information Disclosure Application Form” to Peking University on the morning of April 9. I dragged my tired body and wrote this text to illustrate some of the things that have happened to me recently.
one
After April 9th, I was constantly interviewed by faculty members and leaders of the college, and it continued twice until midnight or even two. During the conversation, the student teacher repeatedly mentioned "Can you graduate successfully," "Do what your mother and grandmother do," and "Student teacher has the right not to contact you directly by your parents." While I was preparing my graduation thesis recently, frequent interruptions and subsequent psychological pressures severely affected my thesis writing.
two
At noon on April 20, I received a reply from the school. The Secretary of the Party Committee of the School of Foreign Languages, the teacher of the Xuegong and the head teacher were present. The secretary of the Party Committee read to me the answer to the open information application of the school:

1. Discussing that Shenyang Shide's meeting level is not enough
2. The investigation results of the Public Security Bureau are not in the scope of school management
3. The content of the public review in Shenyang was not found due to work errors in the Chinese Department.
   The result of this reply disappointed me. However, the submission of graduation thesis will soon be closed, I can only focus on thesis writing.
   three
   At about 11 pm on April 22, the counselor suddenly called me, but because the time was late, I did not receive it. At one o'clock in the morning, the counselor and his mother suddenly came to my dormitory and forced me to wake up and asked me to delete all the information related to the information disclosure incident on my mobile phone and computer. After dawn, I went to the teacher to make a written guarantee Involved in this matter. Students on the same floor can testify. Later, I was taken home by my parents and I can't return to school at the moment.
   My mother and I were awake all night. Schools misrepresented the facts when they contacted their mothers, causing mothers to be overly frightened and emotionally collapsed. Because of the unreasonable intervention of the school, my relationship with my mother was almost broken. The current action of the college has already broken the bottom line. I feel fear and anger.
   What is the crime of applying for information disclosure? I did not do anything wrong, nor would I regret having submitted the "Information Disclosure Application Form" to exercise my honorable rights as a college student in Beijing.
   Twenty years of envy, I love my mother. In the face of her sorrowful cry, self-sacrifice, kneeling requests, and threats of suicide, my heart is bleeding. In her plea, I can only return home temporarily, but I can't stand back from principle. Compromise can't solve any problems. I have no choice but to write this statement and state the story.
   Emotional, please forgive me for being incoherent.
   four
   Here, I formally submitted the following demands to the School of Foreign Languages ​​of Peking University:
4. The School of Foreign Languages ​​of Peking University should openly state in writing the rules and regulations on which I have pressured parents, forced me to interview me in the morning and asked me to delete the relevant information on the disclosure of application information. Illegal and non-compliance operations should be clearly defined during this process. And take measures to prevent such incidents from happening again.
5. The Peking University School of Foreign Languages ​​should immediately cease all acts of pressure on my family, formally apologize to my already frightened mother, clarify the facts, and help repair the family tension caused by the incident.
6. The School of Foreign Languages ​​of Peking University must make an open written guarantee that this matter will not affect my graduation and will not continue to interfere with my dissertation writing process.
7. The School of Foreign Languages ​​of Peking University is responsible for eliminating all adverse effects of this matter on my studies, future employment and family members.
8. The School of Foreign Languages ​​of Peking University should make a clear written response to the appeal and give it to everyone concerned.
   I will retain all legal rights to further investigate the responsibilities of relevant individuals and units, including but not limited to reporting to Peking University and higher authorities the serious violation of school regulations by the Foreign Language Institute.
   Peking University School of Foreign Languages
   April 23, 2018