6.Feistel proposed that we can approximate the ideal block cipher by utilizing the concept of a cipher, which is the execution of two or more simple ciphers in sequence in such a way that the final result or product is cryptographically stronger than any of the component ciphers.

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

What do character formats do for your document's message? a. set the tone b. provide organization c. provide clarity d. set how texts align with documents

Write a program that begins by reading in a series of positive integers on a single line of input and then computes and prints the product of those integers. integers are accepted and multiplied until the user enters an integer less than 1. this final number is not part of the product. then, the program prints the product. if the first entered number is negative or 0, the program must print “bad input.” and terminate immediately. next, the program determines and prints the prime factorization of the product, listing the factors in increasing order. if a prime number is not a factor of the product, then it