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GNU Taler must be <a href="https://www.gnu.org/philosophy/free-sw.html">Free/Libre Software</a>. For merchants, Free/Libre Software prevents vendor lock-in meaning merchants can easily choose another service provider to process their payments. For countries, Free/Libre software means GNU Taler can not compromise sovereignty by imposing restrictions or requirements. And for exchange operators, transparency is crucial to satisfy <a href="https://en.wikipedia.org/wiki/Kerckhoffs's_principle">Kerckhoff's principle</a> and to establish public confidence.
GNU Taler 必須是<a href="https://www.gnu.org/philosophy/free-sw.html">自由軟體</a>。對於商家來說，自由軟體防止供應商鎖定(lock-in)，這意味著商家可以輕鬆選擇其他服務提供商來處理他們的付款。對於國家來說，自由軟體意味著 GNU Taler 無法通過施加限制或要求來損害其主權。對於交易所運營商而言，透明度對於滿足<a href="https://en.wikipedia.org/wiki/Kerckhoffs's_principle">Kerckhoff's principle</a>尤其重要，這也能建立公眾的信心。
Contributors to GNU Taler with Git access must sign the <a href="/pdf/copyright.pdf">copyright assignment</a> to ensure that the <a href="https://git.gnunet.org/gnunet-ev.git/tree/gnunet_taler_agreement.tex">GNUnet e.V. --- Taler Systems SA agreement on licensing and collaborative development</a> of the GNUnet and GNU Taler projects is satisfied.
擁有 Git 存取權限的 GNU Taler 貢獻者必須簽署 <a href="/pdf/copyright.pdf">版權轉讓</a> ，以確保已滿足 GNUnet 與 GNU Taler 專案項目的<a href="https://git.gnunet.org/gnunet-ev.git/tree/gnunet_taler_agreement.tex">GNUnet e.V. --- Taler 系統對於授權與協同開發的 SA 協議</a>。
Malicious operators, fat fingers, computer glitches, gremlins. Things go wrong. GNU Taler must be designed to tolerate failure of individual components and systems. Where the system can continue running safely, it will continue running safely. Where it must halt an operation, other operations must not be needlessly pulled offline. Where systems fail, they must fail gracefully. GNU Taler must have a plan to recover from malicious operators compromising core secrets.
惡意操作員、手滑 (fat fingers)、電腦故障、gremlins。差錯會發生。GNU Taler 的設計必須有容忍單個組件和系統的故障的能力。在系統可以繼續安全運行的地方，它將繼續安全運行。在它必須暫停運作的時，其他操作在非必要情況下不能離線。系統發生故障時，它們必須正常運行。GNU Taler 必須制定一個計劃，以從危害核心秘密的惡意運營者中恢復。
GNU Taler must be designed to be efficient. Quite simply, efficiency means fewer things to break, and it means more transactions per second and lowers our environmental impact. Efficiency is also critical for GNU Taler to be used for micropayments. Therefore certain expensive primitives, such as proof-of-work, must not be used by GNU Taler.
GNU Taler 必須設計成高效率地。簡而言之，效率代表更少工作量、每秒從事更多的交易、更低的環境影響。效率對於將 GNU Taler 用於小額付款也至關重要。因此，GNU Taler 不得使用某些昂貴的原語 (primitives)，例如工作量證明 (proof-of-work)。
GNU Taler must be usable for non-expert customers including end-users of a GNU Taler wallet, merchants who wish to accept payments using GNU Taler, and 3rd party application developers for e-commerce and other platforms. GNU Taler must follow best-practices usability guidelines and incorporate feedback from experts and users. Free/Libre software also requires Free/Libre documentation to allow for informed choices. GNU Taler must provide well-documented Application Programming Interfaces (APIs) to allow frictionless integrations between GNU Taler and other projects.
GNU Taler 必須適用於非專家客戶，包括 GNU Taler 錢包的終端使用者、希望使用 GNU Taler 接受付款的商家以及電子商務和其他平台的第三方應用程序開發人員。GNU Taler 必須遵循最佳實踐可用性準則，並吸收專家和用戶的回饋。為了做出明智的選擇，自由軟體還需要自由文件。
GNU Taler 必須提供文件齊全的應用程序編程接口 (APIs) ，以實現 GNU Taler 與其他項目之間的無障礙整合 (frictionless integrations)。
GNU Taler 必須提供文件齊全的應用程序編程接口 (APIs) ，以實現 GNU Taler 與其他項目之間的無障礙整合 (frictionless integrations)。
GNU Taler must be usable for non-expert customers including end-users of a GNU Taler wallet, merchants who wish to accept payments using GNU Taler, and 3rd party application developers for e-commerce and other platforms. GNU Taler must follow best-practices usability guidelines and incorporate feedback from experts and users. Free/Libre software also requires Free/Libre documentation to allow for informed choices. GNU Taler must provide well-documented Application Programming Interfaces (APIs) to allow frictionless integrations between GNU Taler and other projects.
GNU Taler 必須適用於非專家客戶，包括 GNU Taler 錢包的終端使用者、希望使用 GNU Taler 接受付款的商家以及電子商務和其他平台的第三方應用程序開發人員。GNU Taler必須遵循最佳實踐可用性準則，並吸收專家和用戶的回饋。為了做出明智的選擇，自由軟體還需要自由文件。
GNU Taler必須提供文件齊全的應用程序編程接口 (APIs) ，以實現 GNU Taler 與其他項目之間的無障礙整合 (frictionless integrations)。
GNU Taler必須提供文件齊全的應用程序編程接口 (APIs) ，以實現 GNU Taler 與其他項目之間的無障礙整合 (frictionless integrations)。
Taler does not introduce a new currency. Taler uses a digital wallet storing coins and payment service providers with escrow accounts in existing currencies. Thus, Taler's cryptographic coins correspond to existing currencies, such as US Dollars, Euros or even Bitcoins.
Taler 並沒有引入新的貨幣。Taler 使用一種電子錢包來儲存貨幣以及付款服務提供商來從已存在的貨幣中提供託管帳戶。因此，Taler 的加密貨幣對應到已存在的貨幣，如：美金、歐元、甚至是比特幣。