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Update linyuanye3.md #172

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8 changes: 8 additions & 0 deletions linyuanye3.md
Original file line number Diff line number Diff line change
Expand Up @@ -145,5 +145,13 @@ PoS(权益证明,如以太坊2.0)
供应链:透明溯源(如商品防伪)
医疗:患者数据跨机构安全共享
金融:DeFi(去中心化借贷、交易)
### 2025.03.09
2.1 application of cryptography in blockchain 哈希函数 SHA-256 公钥:加密信息。公开的,任何人都能使用。用于验证交易的真实性 私钥:解密信息。私有的,只有持有者才能解密。用于签署交易 数字签名:确保交易真实性和完整性的技术

作用:通过私钥对交易信息进行前面,确保交易没有被篡改,并证明交易确实来自所声称的发送者
应用:在区块链中,发送者使用私钥对交易进行签名,而接收者或其他节点使用发送者的公钥验证签名的真实性 零知识证明:允许验证者证明自己知道某个值,而无需揭示该值的密码技术。eg.隐私币,零知识证明用于证明交易的有效性,而无需揭示交易的具体细节 多重签名:需要多个私钥才能签署交易
2.2 blockchain 数据以block为单位产生和存储,并按照时间顺序收尾相连形成chain结构
### 2025.03.10
区块链包含自诞生以来发生的所有交易(每个block头部包含了上一个block的哈希值,层层串联)。->要篡改一笔交易,它之后所有block的父区块哈希都要篡改,需要大量运算,(伪造交易链和在正确的区块产生钱快速运算成伪造区块(要求连续产生一定数量的区块交易才会缺省,所以需要保证连续伪造多个区块)/利益方拥有全网超过50%的算力,利用区块链中少数服从多数的特点,篡改)
笔记内容
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