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Encipher the following emperors’ names using a Shift Cipher with the given key. Pompeii, key = D....

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Question

Programming

Encipher the following emperors’ names using a Shift Cipher withthe given key.

  1. Pompeii, key = D. ___________
  2. Vespasian, key = P. _________
  3. Caligula, key = H. _________
  4. Nero, key = T. _____________

Answer & Explanation Solved by verified expert
4.4 Ratings (822 Votes)

Solution

Step 1

Convert the letters into the numbers that matches alphabet

(A=0,B=1,C=2,D=3,E=4,….Y=24,Z=25)

Step 2

Calculate

Y=(X+K) mod 26

Step 3

Now convert the Y into letter matches

a)

Pompeii, key = D

P

O

M

P

E

I

I

                      15

14

12

15

4

8

8

Now Key=D

D=3

P

O

M

P

E

I

I

                      15

14

12

15

4

8

8

3

3

3

3

3

3

3

18

17

15

18

7

11

11

Step4

P

O

M

P

E

I

I

                      15

14

12

15

4

8

8

3

3

3

3

3

3

3

(mod 26)

18

17

15

18

7

11

11

18

17

15

18

7

11

11

Step 5

Now convert back to letters

P

O

M

P

E

I

I

                      15

14

12

15

4

8

8

3

3

3

3

3

3

3

(mod 26)

18

17

15

18

7

11

11

18

17

15

18

7

11

11

S

R

P

S

H

K

K

Therefore Answer is

SRPSHKK

---

b)

Vespasian, key = P

V

E

S

P

A

S

I

A

N

21

4

18

15

0

18

8

0

13

key P

15

15

15

15

15

15

15

15

15

36

19

33

30

15

33

23

15

28

(mod 26)

10

19

7

4

15

7

23

15

2

K

U

H

E

P

H

X

P

C

Therefore Answer is

KUHEPHXPC

---

c)

Caligula, key = H

C

A

L

I

G

U

L

A

2

0

11

8

6

20

11

0

key H

7

7

7

7

7

7

7

7

9

7

18

15

13

27

18

7

(mod 26)

9

7

18

15

13

1

18

7

J

H

S

P

N

B

S

H

Therefore Answer is

JHSPNBSH

---

d)

Nero, key = T

N

E

R

O

13

4

17

14

key T

19

19

19

19

32

23

36

33

(mod 26)

6

23

10

7

G

X

K

H

Therefore Answer is

GXKH
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