Computers and Technology, 18.07.2019 22:10, krystlemiller11211
The 32-bit swap after the sixteenth iteration ofthe des algorithm is needed to make the encryption processinvertible by simply running the ciphertext back through thealgorithm with the key order reversed. this was demonstrated inproblem 3.7. however, it still may not be entirely clear why the32-bit swap is needed. to demonstrate why, solve the followingexercises. first, some notation:
a||b
= the concatenation of the bit stringsa and b
ti(r||l)
= the transformation defined by the ithiteration of the encryption algorithm, for 1 (not=) i (not= ) 16
tdi(r||l)
= the transformation defined by the ithiteration of the decryption algorithm, for 1 (not = ) i (not =) 16
t17(r||l)
= l||r. thistransformation occurs after the sixteenth iteration of theencryption algorithm.
Answers: 2
Computers and Technology, 22.06.2019 15:00, yeet74
I'm taking a class on how to make a movie, and it offers some apps that would be in the process. the thing is, i don't have any of those ha. if you have any tips on some apps i could use, that would be awesome. i don't have an iphone, so don't suggest any apps like imovie. i know that this is a weird question, but it would be super for me. : )
Answers: 2
Computers and Technology, 23.06.2019 01:20, shiann2002
Me with this program in c++ ! computers represent color by combining sub-colors red, green, and blue (rgb). each sub-color's value can range from 0 to 255. thus (255, 0, 0) is bright red. (130, 0, 130) is a medium purple. (0, 0, 0) is black, (255, 255, 255) is white, and (40, 40, 40) is a dark gray. (130, 50, 130) is a faded purple, due to the (50, 50, 50) gray part. (in other word, equal amounts of red, green, blue yield gray).given values for red, green, and blue, remove the gray part. ex: if the input is 130 50 130, the output is: 80 0 80. thus, find the smallest value, and then subtract it from all three values, thus removing the gray.
Answers: 3
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