區塊鏈是一種分散式帳本儲存技術，利用加密演算法與共識機制，達到每個人擁有一份一模一樣的帳本，維持去中心化運作，且不被各別竄改，即使駭客欲攻擊帳本竄改記錄，也必需竄改一半以上的帳本，才會被承認，否則於事無補。區塊鏈也得以讓網路做到價值轉移，不會產生雙重支付的問題。 智能合約具備「解決現實生活合約產生的問題」及「不須中間機構執行合約」的特點，使得買賣雙方只需輸入各自所需的條件，程式便能自動履行合約內容，完成交易，並將交易記錄在區塊鏈，達到雙方無法竄改，駭客亦無法竄改的目的。並且智能合約是以消費者的使用方式計費，金額數字可以低於小數點以下好幾位數，故消費者無感，反而增進消費次數，業者因而獲利更多。 台灣產業應正視區塊鏈這項技術，趁智能合約發展仍屬初期，好好培養軟體開發人才，並搭配本身具有硬體發展之長處，結合成為有益大眾的事業。例如物聯網硬體搭配智能合約軟體，便是可以優先考慮的方向，進而再深化軟體發展，增進影響力。;Blockchain is a decentralized ledger technology ( DLT ). It uses cryptography algorithms and consensus mechanism to achieve a same record of the ledger for everyone and maintains decentralized transactions. The record is not tampered by each node. Even if the hacker wants to attack the record, he has to tamper record with more than 51% of the ledgers before it is accepted by nodes. Otherwise, the attack will not work. The blockchain also perform value transfer on network and without double spending. Smart contracts have the characteristics of "resolving real contracts problem" and "no intermediaries executing contracts". Buyers and sellers only input their own conditions, and the program can automatically fulfill the contract and complete the transaction. Besides, the transaction is recorded in the blockchain, so that both parties cannot modify it and the hacker also cannot tamper with it. And smart contracts are billed depends on consuming behavior, and the amount can be as small as several digits below the decimal point. Thus, the profits is increased for industry because consumers don’t care about small bill then spend more. Taiwan′s industry should face up to the technology of blockchain. Especially the development of smart contracts is still in its infancy, it is necessary to cultivate talents for software development, and combine the advantages of hardware development with itself, and become an enterprise that is beneficial to nations. In my humble opinion, the Internet of Things (IoT) hardware and smart contract software are the directions that can be given priority, and then deepen the development of software and improve their ability.
