Write some software application

Assigned Project • Secure Instant Point-to-Point (P2P) Messaging • In this project, you need to design a secure instant messaging tool for Alice and Bob (like Gtalk, skype or ICQ chat). The system supports the following functions – Alice and Bob can use the tool to send instant messages to each other. Alice and Bob share the same password (or passphrase), they must use the password to set up the tool to correctly encrypt and decrypt messages shared between each other. – Each message during Internet transmission must be encrypted using a 56-bit key. You can use any computer language (Java, C++, Python) and leverage any existing opensource software, tools, or commands (e.g., md5sum, sha1sum) to design the system. Design Issues • With a 56-bit key, what cipher you should use? • DO NOT directly use the password as the key, how can you generate the same key between Alice and Bob to encrypt messages? • What will be used for padding? A graphical user interface (GUI) is preferred. – Display ciphertext and plaintext • How should Alice and Bob set up an initial connection and also maintain the connection with each other on the Internet? – You may refer to socket/network programming in a particular computer language Extra Credits • Design a key management mechanism to periodically update the key used between Alice and Bob. Justify why the design can enhance security.