Question

Decipher the following. They have been enciphered using a Shift Cipher with the given key.

1. OMFMOAYNE, key = 12.
2. TJNXWNVM, key = 19.
3. LHAXEWJ, key = 22.
4. DBSLEXO, key = 10.
5. GDBPC ATVXDC, key =15.

Decipher the following. They have been enciphered using a Shift Cipher with the given key.

1. QSBHIFWCB, key = O.
2. CQN ADKRLXW ARENA, key = J.
3. ZKBYQD SQBUDTQH, key = Q.
4. VTXLTKBTG LXVMBHG, key = T.

Answer 1

In cipher encryption and decryption all the alphabets are in the number that matches its order in the alphabet starting from 0.

A=0, B=1, C=2, ... , Y=24, Z=25.

The formula to decrypt the cipher code is:

decrypt_alphabet = (encrypt_alphabet_number + key) mod 26

Step by step solution of all questions are in the below picture

  

So, the answer is:

1. OMFMOAYNE, key = 12.

CATACOMBS

2. TJNXWNVM, key = 19

AQUEDUCT

3. LHAXEWJ, key = 22.

PLEBIAN

4. DBSLEXO, key = 10.

TRIBUNE

5. GDBPC ATVXDC, key =15.

ROMAN LEGION

6. QSBHIFWCB, key = O.

CENTURION

7. CQN ADKRLXW ARENA, key = J.

THE RUBICON RIVER

8. ZKBYQD SQBUDTQH, key = Q.

JULIAN CALENDAR

9. VTXLTKBTG LXVMBHG, key = T.

CAESARIAN SECTION