It security UE Past Papers Questions.

Encrypt the word `` GUIDANCE`` using the following ciphers

• Additive cipher with key = 20
• Multiplicative cipher with key = 15

Define cryptanalysis and mention the attack that adversary can use to decrypt that above ciphertext.

Answer / Solution

UNSOLVED

Halima wants to encipher plaintext made of both letters a-z and digits 0-9 . If she uses an additive cipher,

• what is the key domain ?
• What is modulus ?

Answer / Solution

UNSOLVED

Determine and give reasons whether the P-box with the following permutation table is a straight P-box , a compression P-box or an expansion P-box

Answer / Solution

UNSOLVED

Determine and give reasons whether the P-box with the following permutation table is a straight P-box , a compression P-box or an expansion P-box

Answer / Solution

UNSOLVED

Determine and give reasons whether the P-box with the following permutation table is a straight P-box , a compression P-box or an expansion P-box

Answer / Solution

UNSOLVED