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Email encryption using hybrid cryptosystem based on Android

机译：使用基于Android的混合密码系统进行电子邮件加密

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The 21st Century is often called the Information Century. Information technology is being used in all areas of life from medicine to astronomy. The list of developments and advances happened in those areas thanks to information technology penetration is endless. As the world become digitized more and more and information technology becomes ubiquitous, creating electronic and digital phenomena such as digital economy, e-democracy, e-government, e-business, e-bank, e-health system, e-education, even e-agriculture, traditional illegal activities are penetrating into the virtual world as well. As a result, an entirely new type of criminal activities has emerged threatening the security and integrity of the system, network, and information. In case of a system error, it can be fixed after a certain amount of time, but how about information security? This is becoming one of the most important problems. There is classified information that can have implications on national level. Even the best encryption and highest security firewalls can be breached to delete, steal, or change such protected information. Therefore, we need implementing hybrid cryptosystem. This paper focus on securing e-mail communication on Android OS by using the hybrid cryptosystem which is a combination of symmetric, public key encryption system and hash function.
机译：21世纪通常被称为信息世纪。从医学到天文学，信息技术正在生活的各个领域中使用。由于信息技术的渗透，在这些领域中发生的发展和进步的清单是无止境的。随着世界变得越来越数字化，信息技术无处不在，产生了电子和数字现象，例如数字经济，电子民主，电子政务，电子商务，电子银行，电子卫生系统，电子教育，甚至电子农业，传统的非法活动也正在渗透到虚拟世界中。结果，出现了一种全新的犯罪活动，威胁到系统，网络和信息的安全性和完整性。如果发生系统错误，可以在一定时间后将其修复，但是信息安全性如何？这正在成为最重要的问题之一。机密信息可能会对国家层面产生影响。甚至最好的加密和最高安全性的防火墙也可以被破坏，以删除，窃取或更改此类受保护的信息。因此，我们需要实现混合密码系统。本文致力于通过使用混合加密系统来保护Android OS上的电子邮件通信，该系统是对称，公钥加密系统和哈希函数的组合。

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