Week 2 Practice Quiz

1. 1DES is based on what network?
   
   

   1. AFeistel network
   2. Bsubstitution-permutation network
   3. CKerckhoffs network
   4. DLai-Massey construction
2. 2DES input key is often stated as 64-bit. What bit is used as the parity bit is used as an odd parity bit?
   
   

   1. A8th bit
   2. B1st bit
   3. C7th bit
   4. D0 bit
3. 3According to the rule of odd parity bit, what is the new DES input key bit number instead of 64 since every eighth bit is ignored?
   
   

   1. A56 bits
   2. B54 bits
   3. C8 bits
   4. D64 bits
4. 4DES is most susceptible to what type of attack?
   
   

   1. ADenial-of-Service
   2. BSniffer Attack
   3. CEavesdropping
   4. DBrute-force attacks
5. 5Which below is a major security concern of the DES?
   
   

   1. AKey Size
   2. BRound size
   3. CXOR procedure
   4. DDecryption technique
6. 6Of the attempted attacks on the DES, which one is not of high interest?
   
   

   1. ABrute force attack
   2. BDifferential Cryptanalysis
   3. CLinear Cryptanalysis
   4. DProcedural Cryptanalysis
7. 7What cipher was not considered as an improvement over the DES when the AES was developed?
   
   

   1. AMars
   2. BSerpent
   3. CTwofish
   4. DBlowfish
8. 8The effort nicknamed DESCHALL used a collection of tens of thousands of computers to crack a DES message by trial and error in 7 months.
   
   

   1. AVerdadero
   2. BFalso
9. 9An approach for strengthening DES is to use key whitening.
   
   

   1. AVerdadero
   2. BFalso
10. 10The matrix that gets operated upon throughout the encryption during the substitution bytes layer is known as________.
    
    

    1. AMatrix
    2. BS-Box
    3. CState
    4. DStateless

11. 11The inverse substitute byte transformation make use of an inverse s-box.
    
    

    1. AVerdadero
    2. BFalso
12. 12During the ShiftRows Sublayer, The first row of state is altered.
    
    

    1. AVerdadero
    2. BFalso

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CPSI 4113 Test sobre Week 2 Practice Quiz, creado por Adam Peterson el 17/09/2018.

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