无论您是將重要文件刻錄到 CD 或 DVD 歸檔，還是為任何類型的數字資料建立存儲或共享副本，均可隨時使用 FastSum 驗證其完整性。
FastSum 基於久經考驗的 MD5 校驗和算法構建，該算法在全球範圍內被用於文件完整性校驗，其應用歷史至少已超過十年。
文件大小：10.3 MB
全面管控文件安全。無論您是將重要文件刻錄至 CD/DVD 存儲介質，還是處理任何形式的待存儲/共享數字資料，您可隨時利用 FastSum 校驗其完整性。
FastSum 採用經過充分驗證的 MD5 校驗和算法，該國際通行技術已持續應用於文件完整性校驗領域逾十年。本軟件提供三種操作界面：從專業技術人員使用的控制台應用程序，到適用於各級用戶的現代化圖形化界面。
核心原理
文件選定後，FastSum 將根據 MD5 校驗和算法計算其數字指紋。該指紋可便捷地與預存校驗值比對，亦能存儲供後續完整性校驗。對於終端用戶而言，MD5 校驗和最顯著的兩大特性在於固定長度與不可逆性。前者體現為無論源文件體積如何，總能生成精簡的128位校驗值，便於存儲與分享；後者則意味著非相同文件必然產生相異校驗值，即便僅存在微調，其短小精悍的固定長度校驗值亦能精準探測文件變動。
无论您是将重要文件刻录到 CD 或 DVD 存档中，还是将任何类型的数字材料刻录到存储或共享中，您都可以随时使用 FastSum 检查其完整性。
FastSum 建立在久经考验的 MD5 校验和算法之上，该算法在全球范围内用于检查文件的完整性，并且至少在过去 10 年中一直用于此目的。
File size: 10.3 MB
Take control of your files. Whether you have the important files burned on a CD or DVD archive, or just about any kind of digital materials that you intend to put for storage or share, you can always check its integrity with FastSum.
FastSum is build upon the well proven MD5 checksum algorithm which is used worldwide for checking integrity of the files, and been used for this purpose for at least the last 10 years. FastSum provides you with three interfaces from the console application for technician professionals to modern graphical application for any-level users.
What’s inside?
When you select files FastSum computes their checksums according to the MD5 checksum algorithm, which can be easily compared with previously computed checksums or stored for future integrity checking. There are two most important MD5 checksum properties for the end-user: the fixed size and the non-discoverability. The first property means that it does not matter how big the source file is, it always has a short 128bit MD5 checksum value that can be compactly stored and easily shared. While the second property implies that a pair of nonidentical files will have different MD5 checksum value i.e. even a short fixed size value is enough for detecting changes within the file.
