Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Experiment 6: AES Ciphertext Decryption

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Beginner

Intermediate

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What is the purpose of key expansion in the AES decryption process?

a: To add an additional layer of security Explanation

Explanation

b: To generate a set of round keys for subsequent decryption rounds Explanation

Explanation

c: To increase the size of the original encryption key Explanation

Explanation

d: To mix the columns of the state Explanation

Explanation

In the initial round of AES decryption, what is added to the ciphertext?

a: The first round key Explanation

Explanation

b: The last round key Explanation

Explanation

c: The expanded key Explanation

Explanation

d: The MixColumns operation result Explanation

Explanation

What is the purpose of the Inverse MixColumns operation in the AES decryption process?

a: To mix the columns of the state using a fixed matrix Explanation

Explanation

b: To shift the rows of the state to the right Explanation

Explanation

c: To replace each byte of the state with its inverse in the S-box Explanation

Explanation

d: To XOR the round key with the state Explanation

Explanation

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