Abstract
Nowadays, email has become the most widely communication way in daily life. Email is a very important method of communicating across the internet. During transmission and downloads, it uses protocols which are not secure. Spammers and scammers misuse these protocols to gain access to critical data stored in the email. This triggered concerns because sometimes email is used to exchange confidential messages. To improve security and efficiency of email system, we made an email security system for Android mobile phone using Hill Cipher algorithm. Hill Cipher is a classic cryptography algorithm that uses matrix inverse and matrix multiplication operations to hide the message. The initial stage of the encryption process is forming ciphertext by multiplying the key matrix with plaintext matrix. The contents of encrypted messages only can be read by legitimate recipient who has the key. Converting the ciphertext into plaintext is done by multiplying the ciphertext matrix with the inverse key matrix. The email content can be a plain message or a message with an attached file.
Highlights
With rapid developments in communication technologies based on computer and internet, communications via emails has become more and more widespread
This study proposes a new approach to build email security system uses Hill Cipher algorithms on android based mobile phone
Robinson proposes a Cryptography as a Service (CaaS) model, which allows operations to be performed via web services
Summary
With rapid developments in communication technologies based on computer and internet, communications via emails has become more and more widespread. The secure messaging system has three benefits: keeping sensitive information private, preventing anyone from interfering with the contents of the message and authenticating the identity of both the message sender and receiver To overcome these problems, as a solution we implements cryptographic methods to email system to add security on the email system using Hill Cipher algorithms on the Android smartphone. As a solution we implements cryptographic methods to email system to add security on the email system using Hill Cipher algorithms on the Android smartphone Using this application, users can access, send and receive email messages safely and without fear of the message will be known to the parties who are not interested. It does not overload the system and secure, since the process of sending up to receive messages
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