Virtual Labs

Computer Science and Engineering Cryptography Lab Experiments

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Experiment 4 - AES Key Generation

Choose difficulty:

Beginner

Intermediate

Advanced

What is the total number of round keys generated in AES-128 key expansion?

a: 10 Explanation

Explanation

b: 11 Explanation

Explanation

c: 12 Explanation

Explanation

d: 14 Explanation

Explanation

Which of the following is NOT a step in AES key expansion?

a: Subword rotation Explanation

Explanation

b: Mix Columns Explanation

Explanation

c: Rcon addition Explanation

Explanation

d: Initial permutation Explanation

Explanation

Rcon values used in key expansion are applied only to:

a: The first word of each round key Explanation

Explanation

b: The last word of each round key Explanation

Explanation

c: Every even word Explanation

Explanation

d: All words equally Explanation

Explanation

Which of the following ensures nonlinearity in AES key schedule?

a: XOR operations Explanation

Explanation

b: RotWord Explanation

Explanation

c: SubWord + S-Box Explanation

Explanation

d: Rcon constants Explanation

Explanation

Consider AES-128. How many 32-bit words are generated in total during the key schedule?

a: 11 Explanation

Explanation

b: 20 Explanation

Explanation

c: 44 Explanation

Explanation

d: 60 Explanation

Explanation

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