金融領域數位轉型賦能技術：嵌入區塊鏈和數位身份之簽章

The Enabling Technique for Digital Transformation in Financial Sectors: a Signatory Embedded Blockchain and Digital Identity

隨著數位轉型的到來，金融領域的傳統簽名系統也必須面臨多元化的數據資訊交換環境。這樣的場域也需要更快、更安全的數字簽名機制來保證數據安全，如果將非對稱密鑰的算法與區塊鏈結構相結合，在計算性能上可以與傳統的對稱密碼系統相媲美，並且可以同時完成簽名和身份驗證操作，其機制能夠系統化地進行數位簽章，讓數據保護和資訊交換模式更安全。此數位簽章除了能夠符合金融領域應用的合規性，進一步確保機密資訊的安全。因此，為了適應未來數位轉型的需要，本研究利用Hash 函數和區塊鏈概念構建了一種新穎包含數位身份的數位簽章架構。該架構具有以下優勢：1. 構建快速、安全、可靠的離線身份認證機制，無需依賴認證中心參與線上認證，降低認證頻率和頻寬佔用；2. 建立一個多重困難度的混合公鑰密碼機制滿足數位簽章保密性、完整性、認證性和不可否認性的基本安全要求，來抵抗常見的網絡攻擊方式。

"With the advent of the digital transformation, traditional signature systems in financial sectors must also face a diversified data information exchange environment. At the same time, a faster and more secure digital signature mechanism is required to ensure data security. If the algorithm of the asymmetric key is combined with the blockchain structure, it is designed to be comparable to the traditional symmetric cryptographic system in terms of computing performance, and can complete the signature and verification operations at the same time. These functions will be digitally signed systematically. The data protection and message exchange mode is more secure. In addition to being able to adapt to the restricted digital signatures in the finance industry, it can also ensure the security of confidential information. Therefore, in order to meet the needs of future digitization, this research uses hash function and blockchain algorithm to construct a novel digital signature mechanism. This architecture has the following advantages: 1. Build a fast, safe and reliable offline self-identity authentication mechanism, without relying on the authentication center to participate in authentication online, reducing authentication frequency and bandwidth usage. 2. Establish a mixed public key cryptosystem with multiple difficulties, in addition to meeting the basic security requirements of confidentiality, integrity, authentication and non-repudiation, and resisting common network attack modes."