Secured email system using cryptography

Computer science

The main reason for using email is probably the convenience and speed with which it can be transmitted, ir-respective of geographical distances. Similar to a post-card, an email has open access to the systems on its path. If anyone wants to intercept, copy or alter information, they can easily do so. Confidential information, such as bank statements, trade secrets, and even national secret information, is being exchanged through emails. There- fore, the contents of emails are more important and valuable than ever, and their security has raised many concerns. The main reason for not using encryption in email communications is that current email encryption solutions require expensive operations and hard key management. Therefore, research on simple, highly secure and efficient email systems are in great need. Current email systems that use symmetric and asymmetric cryptographic schemes super from key management problems. Identity Based Cryptography systems, which have been proposed to address such key management issues, also suffer from the key escrow problem, which violates the non-repudiation feature that should be offered by security systems. Most of the existing mailing systems provide limited authentication .In symmetric cryptography, the main disadvantage is that the same key is used. The main idea is to use asymmetric key encryption which is way more secured than symmetric encryption. The data is encrypted using AES algorithm (Advanced encryption standard).

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