Encryption Algorithm And Its Application

With the development and the ampliative applying-scope of network technology, the exchange of network information is more frequent and important, so we need to establish secure information system. Therefore, it is necessary to study and analyze some cryptogrammic arithmetics and select appropriate ones to apply in the practical information system.This dissertation analyzes the existing popular cryptogram arithmetic, including symmetry cryptogrammic arithmetic, unsymmetry cryptogrammic arithmetic and elliptical curve cryptogrammic technology, and investigates their security characteristics based-upon the software realizations of these arithmetics. As the main work of this dissertation, this paper develops an encrypted e-mail system, and performs some practical tests. The primary works are:1. Deeply research the security performance and realization technologies about the symmetry cryptogrammic arithmetics, the unsymmetry cryptogram arithmetic and the elliptical curve cryptogrammic arithmetic based on the elliptical curve encryption theory.2. Design a framework of encrypting arithmetic components based on AES,RSA, and ECC-MV methods, optimize and assemble these cryptogrammic arithmetics, construct the global structure of the system and the interfaces of DLL components for calling these arithmetics, and use these interfaces in the design and realization of the encrypted e-mail system.3. Based on the above encrypting arithmetic framework, apply the DDL library in the designed encrypted e-mail system, do some practical performance tests, and analyse their results.