文件完整性校验工具设计与实现：MD5算法应用研究

e rapid development of network technology, the complexity of the network environment makes data prone to errors during transmission. Especially with the increasing occurrences of computer viruses and cyber attacks, file integrity checking has become a necessary process. The design of the MD5 checksum calculator is to calculate the MD5 value of a file, which is unique and can be compared with the original value to determine the integrity of the file. This design is implemented using the object-oriented high-level language C, with the core technology adopting the MD5 algorithm. This paper discusses the entire process of designing, developing, and testing the MD5 checksum calculator. It includes the analysis, design, and implementation of the MD5 checksum algorithm, as well as the functional requirements analysis, overall design scheme, and design and implementation details of each functional module of the MD5 checksum calculator. The paper also introduces the technical background and principles of designing and implementing the MD5 checksum calculator. The correct output of the verification results ultimately confirms that this software can solve the problem of verifying file integrity. Keywords: MD5, algorithm, checksum calculator, file integrity.