lice and Bob shares a secret 8-bits key “10110110” for encryption using XOR. Alice wish to 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.

21. RSA problem: given plaintext P, e, prime numbers p, q, compute ciphertext C. Decrypt C and verify you get plaintext P back.

(1) Find a quote that you like. Make sure that the total number of characters is at least 50 and no more than 100.  (2) Then pick a number that is between 4 and 24 as your additive key.  (3) Create a table of correspondence of 26 alphabets in plaintext and the ciphertext.  (4) Use the table of correspondence to encode the quote you found in Part (1). Post the encrypted message:For example, here is a quote from John DeweyFailure is instructive. The person who really thinks learns quite as much from his failures as from his successes.We will use additive key 17. The table of correspondence between plaintext and ciphertext is as follows.(attached)      Thus the encrypted message isWRZ CLI VZJ ZEJ KIL TKZ MVK YVG VIJ FEN YFI VRC CPK YZE BJC VRI EJHLZK VRJ DLT YWI FDY ZJW RZC LIV JRJ WIF DYZ JJL TTV JJV J(5) Pick an encrypted message from your classmate and try to decrypt it. Remember to use the frequency table because you will not have access to the additive key. Make sure to include all…

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…

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Could you devise a key that when it is used on the ciphertext you produced in 1.a, will provide plaintext relish instead of the strike? the photo below is question 1a and please trying to be as detailed as possible when answering the question, justifying well all your steps that you did.

Can you please show the shifts for the encrypt & decrypt in this format?  For example, like this : Example:ABCDEFGHIJKLMNOPQRSTUVWXYZ Row 1FGHIJKLMNOPQRSTUVWXYZABCDE Row 2 If the plaintext to encrypt is:THIS IS THE ANSWER The ciphertext becomes:YMNX NX YMJ FSXBJW This is for me to help understand and to redo the problem for studying.  Thank you!!

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