We know that the size of the key in Data Encryption Standard (DES) is 64 bits, assume for padding we just add 0 at the end of the plaintext (the original message), what is the result of padding for the following text? At first replace the “YYY” with the first 3 letters of your name or family then calculate the padding (show the result in hexadecimal format): “YYYComputerSecurity”

In this problem, you will implement a transposition cipher that, instead of dividing the original text into odd and even characters, separates it into three sets of characters. As an example, we will use this 1977 quote by Digital Equipment Corp. president Ken Olson -- "There is no reason anyone would want a computer in their home." (Spaces are represented with the square u-like character.) There is no reason anyone would want a computer in their home. Rail 1: T r S d i t i h a C. e Rail 2: e a u a u in h Rail 3: a W n. m m Example three-rail transposition. The resulting encrypted text is produced by reading the text horizontally, i.e., adding the three rails: Rail 1 + Rail 2 + Rail 3 = **“Trinrs yeoda cpeitihehesoeoao u naournhro.e annnwlwt mt e m" (without the quotes). Requirements: Implement the three-rail transposition cipher above, placing your code in the file p4_2.py (template I provided, replace comment at the beginning of the file with your own code). Feel free to develop your…

If the sequence number space is k-bit long, use Go-Back-N and selective-repeat. What's the sender window's maximum size?

NEED HELP WITH PYTHON CODE. ALSO, PLEASE PROVIDE DETAILS SEPARATELY ON HOW AND WHAT DID U USE TO GET UR CODE DONE.

AO A B C D E F G H I J K L M 0 1 2 3 4 5 6 7 8 9 10 11 12 N 0 P Q R S T U V W X Y Z 13 14 15 16 17 18 19 20 21 22 23 24 25 (Show your work.) Encrypt the message "TYVQ" using Affine Cipher in English alphabet with a = 7; b =22 and encryption function is f(p) = (7p+22) mod 26 A) hens B) helo C) zine D) zict

The ROT-13 algorithm encrypts a string one character at a time by adding 13 to the value of the internal representation of the character. We want our encryption scheme to cover the entire printable ASCII range. After examining the ASCII character set and their internal representations, we see that characters 0 through 32 and character 127 are control characters. Technically, characters 32 (space) and 127 (DEL) are printable, but we don’t want to include them in our encryption routine. Therefore, we want our encrypted string to only contain characters in the range of 33 through 126. As an example:   Plaintext:              Norwich Ciphertext:                        [|!&vpu   The internal representation of ‘N’ is 78. 78 plus 13 is 91, which is the character ‘[‘. The internal representation of ‘o’ is 111. 111 plus 13 is 124, which is the character ‘|’. The internal representation of ‘r’ is 114. 114 plus 13 is 127. Since 126 is our maximum value for our desired printable range, we…

Encrypt the message " MATH " by translating the letters into numbersand then applying the encryption function given, and then translating the numbers back into letters.(a) f(p)=(17p+5) mod 26 _____ (b) f(p)=(15p+14) mod 26 ___ (c) f(p)=(19p+5) mod 26 ___Use A=0,B=1,C=2,D=3,E=4,F=5,G=6,H=7,I=8, J=9,K=10,L=11,M=12,N=13,O=14,P=15,Q=16,R=17, S=18,T=19,U=20,V=21,W=22,X=23,Y=24,Z=25