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The core of level two is waiting, just like a hunter waiting for prey on the grassland The core of level one is searching, like a gold prospector searching for gold in the river bed The essence of learning is to enhance cognition. Wealth beyond cognition cannot be obtained, easily tolerated, or retained. If you want to make all the money in the market, you will end up making no money at all. You can’t have your cake and eat it too, just try to achieve the ultimate in one direction #axl #sol #Portal

The core of level two is waiting, just like a hunter waiting for prey on the grassland

The core of level one is searching, like a gold prospector searching for gold in the river bed

The essence of learning is to enhance cognition. Wealth beyond cognition cannot be obtained, easily tolerated, or retained.

If you want to make all the money in the market, you will end up making no money at all.

You can’t have your cake and eat it too, just try to achieve the ultimate in one direction

#axl #sol #Portal

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【每天一个web3概念】不可不知的密码学 加密算法是大家在公链、钱包等领域最常听到的概念。但是如何确保钱包的安全,如何确保区块的链接?这都需要密码学的帮助。密码技术是区块链系统安全保障的底层技术。在web3常用到的哈希函数、公私钥对就是其中的代表。 哈希算法(Hash Function):也叫哈希函数,简称哈希,它能够实现任意长度的输入,转换成固定长度的输出:h=H(m),意味着你随便输入什么,经过哈希算法,最后得到的都是一串固定长度的字符,一个输入对应一个输出,而它的安全性建立在它的抗碰撞性(Collision-Resistant),即很难找到两个输入拥有同一个输出。 在区块链中,有两个地方用到了哈希函数,一个是Merkle树根哈希,一个是连接区块的区块指针。Merkle树根哈希是给所有的交易求哈希,然后组成一个新的值再求哈希,最后求到只有一个哈希值即Merkle树根哈希。因为无法找到两个输入有同一个输出,这就意味着只要交易的内容变了,那么Merkle树根哈希也会跟着变,所以只要根哈希不变,交易就是正确的。同理,给一个区块数据整体求一个哈希,最后得到的整个哈希值放入到下一个区块头里,只要这个哈希值不变,那么意味着前面的所有区块都没有被篡改,都是正确的。 公私钥对:就是大名鼎鼎的公钥密码算法。 公钥密码算法使用一对相关的密钥来进行加密和解密:一个是公开的“公钥”,另一个是保密的“私钥”。“公钥”可以公开给任何人,用于加密数据。“私钥”必须保密,只有拥有者知道。它用于解密由相对应的公钥加密的数据。 公钥密码算法是基于某些数学问题的复杂性,比如RSA算法(非对称加密的一个流行示例)的安全性基于大数分解的难度。换句话说,你可以将这个过程想象为一个加密和解密的"黑盒"。 #每日学习 #eth #BTC!
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