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从概念到底层技术，一文看懂区块链架构设计（附知识图谱）
Hashcash is a proof-of-work algorithm, which has been used as a denial-of-service counter measure technique in a number of systems.
区块链背后的密码学

Resources

openblockchains: Open Public Distributed Databases / (Hyper) Ledger Books with Crypto Hashes - Revolutionize the World with Blockchains One Block at a Time
Awesome Blockchain ⚡️Curated list of resources for the development and applications of blockchain.
Awesome Blockchain: 收集所有区块链(BlockChain)技术开发相关资料，包括Fabric和Ethereum开发资料
区块链资源汇总: 区块链白皮书、书籍、交易所、币种、自媒体等资源汇总 💯