Academic Paper from the year 2019 in the subject Computer Science - IT-Security, grade: A, Fordham University (Cyber-security Department), language: English, abstract: The purpose of this paper is to write a cryptosystem encoding RSA code in C language and verify it mathematically. RSA is one of the first public-key cryptosystems and is widely used for secure data transmission. In such a cryptosystem, the encryption key is public, and it is different from the decryption key which is kept secret. Procedure: Choose two prime numbers p and q (these are your inputs). Suppose that you need to send a message to your friend, and you implement the RSA algorithm for secure key generation. You need public and private keys (these are your outputs). You are free to choose other parameters or inputs if you need any. Write a program for the RSA algorithm using any programing language such as C to generate your public and private key. Your program will display the following: (1) public and private keys (2) your given message and encrypted message (3) a message for any wrong inputs such as "you entered a number, which is not a prime."