Part 2: EncryptionObjective:Develop a program that encrypts a plaintext file byXORing 128-bit blocks of the file with a key repeatedlyuntil the entire file is encrypted.Details:• The plaintext file will be a book from ProjectGutenberg.• The encryption method should use the XORoperation on the file, 128 bits at a time, with the key.• Each 128-bit block is XORed with the same key.• The program should work from the command lineand accept three parameters:o The name of the key fileo The name of the plaintext fileo The desired name of the resulting ciphertext fileNote:This encryption method is not supposed to be secure.Usage:$ ./bad_streamcipher_enc kf pt ct 9:46$ ./bad_streamcipher_dec kf ct pt2descriptionPart 4: CryptanalysisDetails:DoneObjective:Outline a method for breaking the encryption schemeimplemented in Part 2 and, optionally, develop a solutionto demonstrate breaking the encryption under certainassumptions.(• Provide a method to break the scheme under knownplaintext attack (KPA) assumptions.• Bonus: Code a solution to break an arbitraryciphertext under KPA assumptions and demonstratethat it works.1• Bonus: Code a solution that breaks the encryptionunder ciphertext-only assumptions and demonstratethat it works.• Compile a report written in Markdown with properformatting of code and text to present your solutionand findings.Submission GuidelinesEnsure to test your programs thoroughly to confirm

Develop a basic encryption and decryption system utilizing classic and stream ciphers. The initial phase focuses on key generation, striving to establish a secure process for creating a 128-bit key characterized by genuine randomness and uniform distribution. This foundational step ensures the cryptographic system's strength and reliability in safeguarding data through a robust key generation mechanism.Algorithm:Import Necessary Libraries:Import the os and sys modules for operating system-specific functionalities and system-specific parameters and functions.Define the generate_key Function:Create a function named generate_key that takes a key_file parameter.Use os.urandom(16) to generate 128 truly random and uniformly distributed bits (16 bytes).Open the specified file in binary write mode ('wb') and write the generated bytes to it.Check Command-Line Arguments:In the __main__ block, check if the correct number of command-line arguments is provided (expects exactly 2 arguments, including the script name).If the number of arguments is incorrect, print a usage message, and exit the program with an error code.Execute Key Generation:Extract the key file name from the command-line arguments.Call the generate_key function with the specified key file.Print a confirmation message indicating the successful key generation and file saving.1import os 2import sys 3 4def generate_key(key_file): 5 # Generate 128 truly random and uniformly distributed bits 6 key_bytes = os.urandom(16) 7 8 # Save the key to the specified file 9 with open(key_file, 'wb') as file: 10 file.write(key_bytes) 11 12if __name__ == "__main__": 13 # Check if the correct number of command-line arguments is provided 14 if len(sys.argv) != 2: 15 print("Usage: python keygen.py <key_file>") 16 sys.exit(1) 17 18 key_file = sys.argv[1] 19 generate_key(key_file) 20 print(f"Key generated and saved to {key_file}.") 21The Python script generates a 128-bit key using the os.urandom function, ensuring true randomness. It accepts a command-line argument specifying the key file name. The script checks if the correct number of arguments is provided; otherwise, it displays proper usage information and exits. The generated key, represented as 16 bytes, is saved in binary format to the specified file. The script serves as a simple yet secure key generation tool, demonstrating a basic implementation of cryptographic principles for encryption systems. When executed, it prints a confirmation message, indicating the successful generation and storage of the key file.Output:Note: according to the Bartleby guideline we are supposed to answer only one question at a time Kindly resubmit the remaining part of the question

Answered: Part 2: Encryption Objective: Develop a…