![]() #Importing the SymPy library from sympy import randprime Our code should have the logic to ensure that the RSA modulus r is less than 2^KeySize. Therefore, we need to check in our code that the RSA modulus r is not too large for the desired key size. For example, if we want to use a 8-bit key, the RSA modulus r cannot exceed 2^8 = 256. IMPORTANT NOTE: - Talking about the key size (in bits), it is the RSA modulus r that is constrained. And, as we know, the RSA modulus r is used later on in the encryption and decryption processes. r = p* q (remember that the fundamental basis of the RSA Asymmetric Encryption Process is the fact that it is extremely easy to compute the RSA modulus r = p*q, but very difficult to reverse). Once we have the two (different) prime numbers, we should calculate the RSA modulus r. ![]() We need to ensure that the two prime numbers generated are different. SymPy has a method called randprime() that can generate a random prime between two numbers. We are going to use the SymPy built-in Python module. The very first step is to generate two prime numbers, p and q. Implementing the RSA Asymmetric Encryption Process in Python The code has been broken down into three distinct tasks - Key Generation, Encryption and Decryption. This technical article walks the reader through the Python code that can be used to implement the RSA Asymmetric Encryption Process.
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