西维蜀黍

【Java】编码规范（Code Guideline）

Posted by Wei on 2025-06-12, Last Modified on 2025-07-22

【Blockchain】Cryptocurrency（加密货币）

Crypto：来自 “cryptography”（密码学），表示利用加密技术保障交易安全与匿名性。
Currency：货币。

所以 cryptocurrency 指的是：一种使用密码学技术支持的去中心化的数字货币，例如比特币（Bitcoin）、以太坊（Ethereum）等。

Posted by Wei on 2025-06-05, Last Modified on 2025-07-22

【Blockchain】Cryto - Bitcoin（比特币）

Bitoin 比特币

数据结构

block header

version
hash of previous block header
merkle root hash
target
nonce

Block body

Transaction list

Posted by Wei on 2025-06-05, Last Modified on 2025-07-22

【Architecture】System Design - Payment System

Background

Posted by Wei on 2025-05-22, Last Modified on 2025-05-23

【Security】Authentication（身份认证）- JSON Web Token (JWT)

JSON Web Token (JWT) No separate storage needed Invalidation of a JWT is not easy Scaling client and server is easy Structure The three parts are encoded separately using Base64url Encoding RFC 4648, and concatenated using periods to produce the JWT: const token = base64urlEncoding(header) + '.' + base64urlEncoding(payload) + '.' + base64urlEncoding(signature) Header Identifies which algorithm is used to generate the signature. In the below example, HS256 indicates that ...

Posted by Wei on 2025-05-22, Last Modified on 2025-05-23