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

How many bits are used in a standard AES key?

a: 64 bits Explanation

Explanation

b: 128 bits Explanation

Explanation

c: 192 bits Explanation

Explanation

d: 256 bits Explanation

Explanation

In AES key expansion, what is the 'S-box' used for?

a: It is used to perform the initial permutation. Explanation

Explanation

b: It is used to expand the key size. Explanation

Explanation

c: It is used for substitution in the key schedule. Explanation

Explanation

d: It is used to reduce the key size. Explanation

Explanation

Which of the following components is used in AES key expansion?

a: S-box Explanation

Explanation

b: Rcon Explanation

Explanation

c: RotWord Explanation

Explanation

d: All the above Explanation

Explanation

The main goal of AES key expansion is:

a: To increase encryption speed Explanation

Explanation

b: To derive unique round keys to avoid attacks Explanation

Explanation

c: To reduce ciphertext size Explanation

Explanation

d: To compress original data Explanation

Explanation

In AES key expansion, RotWord operation involves:

a: Rotating a word right by 1 byte Explanation

Explanation

b: Rotating a word left by 1 byte Explanation

Explanation

c: Rotating bits right by 1 bit Explanation

Explanation

d: No rotation Explanation

Explanation

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