Question

Estimate the possible key length of the given ciphertext generated by Vigenere Cipher using Kasiski Test.

Ciphertext:

HIBKA UQFLF SBQSX SKCFB YOAGP ALGTC RTYTL

DGBYO AGPAL OAKYB FBILY OYQTD ISVAI JJNNA

DXNLW NRQPF BVPWN IWAFB YAANR URTZE LYZLF

MEWHI BKAUQ FLALJ GTXRG VNIJP ZREQL KWZA

Answer #1

There are repeated letter groups:

HIBKA UQFLF SBQSX SKCFB YOAGP ALGTC RTYTL

DGBYO AGPAL OAKYB FBILY OYQTD ISVAI JJNNA

DXNLW NRQPF BVPWN IWAFB YAANR URTZE LYZLF

MEWHI BKAUQ FLALJ GTXRG VNIJP ZREQL KWZA

The separation (start to start) between the two occurrences of HIBKAUQFL is

108 = 3^{3} . 2^{2 } letters, and the
separation between those of BYOAGPAL is 18 = 3^{2} .2
letters.

Common divisors of these two numbers are 2,3,6,9, and 18, and so these are the most likely keyword lengths.

Estimate the possible key length of the cipher text
“TIGYXKLMPOUMEFRTIGBVTNJPGEGCL” generated by Vigenere Cipher, using
Kasiski Test.

Estimate the possible key length of the cipher text
“TIGYXKLMPOUMEFRTIGBVTNJPGEGCL” generated by Vigenere Cipher, using
Kasiski Test.

Let's say we are using vigenere cipher. We have a key of "red"
and a plain text of "cats and dogs", what is the cipher text? ____
(Keep the space between words, but do not use other
punctuation.)
If we use generic Caesar cipher to encrypt "I have pizza for
lunch", using the key "V". What would the cipher text be? "____" Do
not enter punctuation; keep the space between words.
When using Caesar cipher, if the plain text is...

Encrypt the given plaintext with the key. Built the key matrix
(big size). And show how you get each letter ciphertext (you can do
that by making shapes and arrows in key matrix). No need to draw
key matric again and again. Show all your work. If you just write
cipher text and key matric without showing (shapes and arrow on key
matrix) that how you get the ciphertext then your marks will be
deducted. key : alphabets plaintext :...

Use Playfair cipher to encrypt the plaintext “pink balloon”
using the key exam.

If one was given the length of a string, and a wavelength, it is
possible to solve for the frequency and or is there a pattern
frequency would follow.
Below are values obtained in a lab. I see a pattern in
frequency, which makes me wonder if there is one, and or a way to
solve for one with just the values of string length and
wavelength.
String Length
F
Wavelength
Frequency
.85m
F1
1.7m
16 Hz
.85m
F2
.85m...

Below is an example of key generation, encryption, and
decryption using RSA. For the examples below, fill in the
blanks to indicate what each part is or answer the
question.
Public key is (23, 11) What is 23 called?
_______________, What is 11 called?_______________
Private key is (23, 13) What is 23
called?_______________, What is 13
called?_______________
23 can be part of the public key because it is very hard
to _______________ large prime numbers.
ENCRYPT (m) = m^e mod...

A. Estimate the minimum test length required to achieve a
reliability target of 0.98 at 100hrs with 80% confidence assuming;
no failures, three units tested, and a Weibull shape parameter of
2.5.
B. What about with 95% confidence?

5.
(a) Find the length of the given line, C, using calculus and the
arc length formula:
C: ? = ? + 5 , 1 ≤ x ≤ 2
(b) Revolve the curve above, C, around the x-axis and find the
surface area of the resulting surface of revolution.

A multiple choice test consists of 23 questions with possible
answers of a,b,c,d. Estimate the probability that with random
guessing the number of correct answers is at least 11.

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