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Cipher Decoding - Beginner Level: shift ciphers BEGINNER

Exam-focused quick revision round worksheet: 20 beginner-level cipher decoding questions. Worksheet 3 of 30 targets shift ciphers. Build proficiency in shift ciphers, substitution ciphers, transposition ciphers with detailed solutions. Ideal for entry-level competitive exam preparation.

📝 Worksheet 3 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Cipher Decoding
Worksheet 3 of 30 (10% complete)

Question 1

Using keyboard shift cipher (shift right on QWERTY), encode: 'WORLD'
Keyboard shift (right): WORLD → EPTAF
keyboard, qwerty

Question 2

Using keyboard shift cipher (shift left on QWERTY), encode: 'FINANCE'
Keyboard shift (left): FINANCE → DUBLBXW
keyboard, qwerty

Question 3

Using Vigenère cipher with keyword 'JUNGLE', decode the ciphertext: 'LFBIV'
Vigenère: With key 'JUNGLE', LFBIV → CLOCK
vigenere, polyalphabetic

Question 4

Using the same Caesar cipher that encodes 'CELL' as 'HJQQ', decode: 'XYWFBGJWWD'
Shift = 5. XYWFBGJWWD decoded (shift -5) = STRAWBERRY
caesar, shift

Question 5

Using ROT13 cipher, decode: 'ORGANIZATION'
ROT13 (shift 13): ORGANIZATION → BETNAVMNGVBA
rot13, rotation

Question 6

Using Columnar Transposition cipher with key 'CODE', encode: 'LION'
Columnar Transposition with key 'CODE': LION → LONI
transposition, columnar

Question 7

Using keyboard shift cipher (shift left on QWERTY), encode: 'DECODE'
Keyboard shift (left): DECODE → SWXISW
keyboard, qwerty

Question 8

Using Vigenère cipher with keyword 'CSHARP', decode the ciphertext: 'EGBLU'
Vigenère: With key 'CSHARP', EGBLU → COULD
vigenere, polyalphabetic

Question 9

Using date-based cipher with date 26-06-2019 (sum of day+month+year = 23), decode: 'IFYBOQV'
Date-based cipher: Shift = 23, IFYBOQV decoded → LIBERTY
date, calendar

Question 10

Using keyword cipher with keyword 'FIREWALL', encode: 'FATHER'
Cipher alphabet: FIREWALBCDGHJKMNOPQSTUVXYZ
FATHER → AFSBWP
keyword, substitution

Question 11

Using Atbash cipher (A↔Z, B↔Y, C↔X...), decode: 'TURQUOISE'
Atbash: TURQUOISE → GFIJFLRHV
atbash, mirror

Question 12

Using Baconian cipher (5-bit binary encoding), decode: '01100 01110 10100 01101 10011 00000 01000 01101'
Baconian decoding: 01100 01110 10100 01101 10011 00000 01000 01101 → MOUNTAIN
baconian, binary

Question 13

Using book cipher with 'Cybersecurity Terms' [ENCRYPT, DECRYPT, FIREWALL, VIRUS, MALWARE, HACKER, PHISHING...] (7 pages, 10 words), decode positions: (pg2, w8), (pg2, w4)
Position decoding: AUTHENTICATE VIRUS
book, position

Question 14

Using Atbash cipher (A↔Z, B↔Y, C↔X...), decode: 'CPLUSPLUS'
Atbash: CPLUSPLUS → XKOFHKOFH
atbash, mirror

Question 15

Using Autokey cipher with initial key 'LOCK', encode: 'MESSAGE'
Autokey cipher: MESSAGE with key 'LOCK' → XSUCMKW
autokey, vigenere

Question 16

Using ROT13 cipher, decode: 'EQUATION'
ROT13 (shift 13): EQUATION → RDHNGVBA
rot13, rotation

Question 17

In Morse code, what does '-- --- .-. -. .. -. --.' represent?
Morse decoding: MORNING → -- --- .-. -. .. -. --.
morse, dots-dashes

Question 18

Using book cipher with 'Elementary My Dear Watson' [ELEMENTARY, MY, DEAR, WATSON, SHERLOCK, HOLMES, BAKER...] (4 pages, 10 words), decode positions: (pg2, w9), (pg3, w6)
Position decoding: MYSTERY HOLMES
book, position

Question 19

Using Atbash cipher (A↔Z, B↔Y, C↔X...), decode: 'CRYPTOCURRENCY'
Atbash: CRYPTOCURRENCY → XIBKGLXFIIVMXB
atbash, mirror

Question 20

If 'NEUTRON' is encoded as 'LCSRPML' using Caesar cipher, what is the shift value?
Caesar cipher: NEUTRON → LCSRPML. Shift = 24
caesar, shift
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