CERTIFIED ETHICAL HACKER FINAL PAPER EXAM QUESTIONS ACCURATE ANSWERS
FULL SOLUTION
Certified Ethical Hacker EXAM Script 2026/2027
FULL Evaluation Verified A Questions and Answers
Verified Solutions Latest Update
Question:
RC5.
Answer:
Uses a parameterized algorithm with a variable block size, a variable key size, and a variable
number of rounds. The routines used in RC5 are key expansion, encryption, and decryption.
Question:
RC5 Key Expansion.
Answer:
In the key expansion routine, the secret key that a user provides is expanded to fill the key table (the
size of which depends on the number of rounds)
Question:
RC6.
Answer:
RC6 is a symmetric-key block cipher derived from RC5. Two features that differentiate RC6 from
RC5 are integer multiplication and the use of four 4-bit working registers rather than two 2-bit
registers.
Question:
Blowfish.
Answer:
A symmetric block cipher algorithm designed to replace DES or IDEA algorithms
,Question:
Blowfish Key Expansion Steps.
Answer:
1. Initialize the P-array and S-boxes 2. XOR the P-array with the key bits 3. Encrypt the all-zero
string 4. New output is now P1 and P2 5. Encrypt the new P1 and P2 with the modified subkeys 6.
New output is now P3 and P4 7. Repeat the process 521 times to calculate new subkeys for the P-
array and the four S-boxes
Question:
Threefish.
Answer:
A large tweakable symmetric-key block cipher in which the block and key sizes are equal, using 3
operations
Question:
Twofish.
Answer:
Allows various levels of performance trade-off on parameters such as encryption speed, hardware
gate count, memory usage, etc. This technique of enabling different implementations improves the
relative performance of the algorithm.
Question:
Serpent.
Answer:
One of the most secure encryption mechanisms in AES contests, but has a slower encryption speed
and is more complex
Question:
, Tiny Encryption Algorithm (TEA).
Answer:
A Feistel cipher
Question:
CAST-128.
Answer:
A symmetric-key block cipher having a classical 12-or 16-round Feistel network
Question:
Government Standard (GOST).
Answer:
A symmetric-key block cipher having a 32-round Feistel network working on 64-bit blocks with a
256-bit key length
Question:
Camellia.
Answer:
A symmetric key block cipher that is part of TLS
Question:
Digital Signature Algorithm (DSA).
Answer:
Helps in the generation and verification of digital signatures for sensitive and unclassified
applications
Question:
FULL SOLUTION
Certified Ethical Hacker EXAM Script 2026/2027
FULL Evaluation Verified A Questions and Answers
Verified Solutions Latest Update
Question:
RC5.
Answer:
Uses a parameterized algorithm with a variable block size, a variable key size, and a variable
number of rounds. The routines used in RC5 are key expansion, encryption, and decryption.
Question:
RC5 Key Expansion.
Answer:
In the key expansion routine, the secret key that a user provides is expanded to fill the key table (the
size of which depends on the number of rounds)
Question:
RC6.
Answer:
RC6 is a symmetric-key block cipher derived from RC5. Two features that differentiate RC6 from
RC5 are integer multiplication and the use of four 4-bit working registers rather than two 2-bit
registers.
Question:
Blowfish.
Answer:
A symmetric block cipher algorithm designed to replace DES or IDEA algorithms
,Question:
Blowfish Key Expansion Steps.
Answer:
1. Initialize the P-array and S-boxes 2. XOR the P-array with the key bits 3. Encrypt the all-zero
string 4. New output is now P1 and P2 5. Encrypt the new P1 and P2 with the modified subkeys 6.
New output is now P3 and P4 7. Repeat the process 521 times to calculate new subkeys for the P-
array and the four S-boxes
Question:
Threefish.
Answer:
A large tweakable symmetric-key block cipher in which the block and key sizes are equal, using 3
operations
Question:
Twofish.
Answer:
Allows various levels of performance trade-off on parameters such as encryption speed, hardware
gate count, memory usage, etc. This technique of enabling different implementations improves the
relative performance of the algorithm.
Question:
Serpent.
Answer:
One of the most secure encryption mechanisms in AES contests, but has a slower encryption speed
and is more complex
Question:
, Tiny Encryption Algorithm (TEA).
Answer:
A Feistel cipher
Question:
CAST-128.
Answer:
A symmetric-key block cipher having a classical 12-or 16-round Feistel network
Question:
Government Standard (GOST).
Answer:
A symmetric-key block cipher having a 32-round Feistel network working on 64-bit blocks with a
256-bit key length
Question:
Camellia.
Answer:
A symmetric key block cipher that is part of TLS
Question:
Digital Signature Algorithm (DSA).
Answer:
Helps in the generation and verification of digital signatures for sensitive and unclassified
applications
Question:
