As you know, des is insecure because of its short key length (56 bits). an improvement, proposed by rivest, is desx. desx has key length 120 bits, seen as a pair k = (k1, k2), where k1 is 56 bits and k2 is 64 bits. the encryption of a one-block message m is desx(k, m) = k2 ⊕ des(k1, (m ⊕ k2))

a. explain how decryption is done.

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 must not appear in the factorization. sample runs are given below. note that if the power of a prime is 1, then that 1 must appear in t

What is transmission control protocol/internet protocol (tcp/ip)? software that prevents direct communication between a sending and receiving computer and is used to monitor packets for security reasons a standard that specifies the format of data as well as the rules to be followed during transmission a simple network protocol that allows the transfer of files between two computers on the internet a standard internet protocol that provides the technical foundation for the public internet as well as for large numbers of private networks

Which type of excel chart should be used to track students’ progress on test grades? line column bar pie