The following is a message encrypted using multiplicative cipher but you do not know the key. Decrypt the message and show all your work. VNY LYQ EHH VNY TSD DYL YRO YSR VNY KWL HTJ YVK YYR NEF SRI QWM YVN SRI VWQ EUE RTN EFS RIV WQE UQW MYV NSR I

Encrypt the message " HALT " by translating the letters into numbers(via A=0,B=1,C=2,D=3,E=4,F=5,G=6,H=7,I=8,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,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=25S=18,T=19,U=20,V=21,W=22,X=23,Y=24,Z=25 )and then applying the encryption function given, and then translating the numbers back into letters.(a) f(p)=(p+4) mod 26 _____ (b) f(p)=(p+10) mod 26 ____ (c) f(p)=(p+7) mod 26 _____

One of the one-way functions used in public key cryptography is integer multiplication/factorization. Multiplying two integers is easy, but factoring is hard. The number 1765243 is the product of two primes. What is the smaller of the two primes? What is the largest of the two primes?

The ciphertext "einnd tdkng" is obtained using the substitution cipher with the key below. What is the plaintext? plain alphabet : abc de f g hijkl m nopqrstu v w x y cipher alphabet: p hq g i u me a yln o fd x jkrcv st z w b е а

Write the solution in detail:A) Encrypt the following message using poly-alphabetic cipher:Plaintext: “HELLO WORLD”Key:Shift the first letter three positions to its rightShift the second letter five positions to its rightShift the third letter seven-position to its left B) Using the same key, decrypt the following text:Cipher text= “vjv xwb wd”

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…

1. Use the random substitution cipher below to encrypt the following message: Virtual Event. Write the final code in 4 letter blocks. Original A B |C|D EF GHIJKLMN ОР QRST UVW XYZ Maps to LFNIRD TPSE QJAY G MZB XK WU CVHO Answer:

Encrypt the messageWATCH YOUR STEPby translating the letters into numbers, applying the encryption function f(p) = (−7p+2), and then translatingthe numbers back into letters

a. K = 3 b. Ciphertext: SVFPDQOODHAXHBHUXWDOHHVGDVB plaintext: PSCMANLLEAUEBERUTALEESDASB   2. Determine the Key (K) a. Use Plaintext in Question 1 . b. Cipher Text: TIQEPPIBICVYEPIWGWHERWCEYIX *********Only answer question 2 a and b

lice and Bob shares a secret 8-bits key “10110110” for encryption using XOR. Alice wishto encrypt the following message to Bob: “NOMEETING”Refer to UTF-8 encoding to get the binary code for the letters, and then apply the key to each letter. Write the corresponding ciphert text in binary.