Podcast
Questions and Answers
What is the purpose of the MixColumns transformation in AES?
What is the purpose of the MixColumns transformation in AES?
- To perform a polynomial multiplication on the columns of the state (correct)
- To perform a circular shift on the columns of the state
- To perform a bitwise XOR operation on the columns of the state
- To perform a matrix multiplication on the columns of the state
How is multiplication by $x$ (i.e., {02}) implemented in the MixColumns transformation?
How is multiplication by $x$ (i.e., {02}) implemented in the MixColumns transformation?
- By a 2-bit left shift followed by a conditional bitwise XOR with (0001 1011)
- By a 1-bit right shift followed by a conditional bitwise XOR with (0001 1011)
- By a 2-bit right shift followed by a conditional bitwise XOR with (0001 1011)
- By a 1-bit left shift followed by a conditional bitwise XOR with (0001 1011) (correct)
What is the purpose of the ShiftRows transformation in AES?
What is the purpose of the ShiftRows transformation in AES?
- To perform a circular shift on the rows of the state (correct)
- To perform a polynomial multiplication on the rows of the state
- To perform a matrix multiplication on the rows of the state
- To perform a bitwise XOR operation on the rows of the state
How can the first column of the MixColumns transformation be verified in GF(2^8)?
How can the first column of the MixColumns transformation be verified in GF(2^8)?
What is the purpose of the Inverse ShiftRows transformation in AES?
What is the purpose of the Inverse ShiftRows transformation in AES?
How can the Inverse MixColumns transformation be implemented in AES?
How can the Inverse MixColumns transformation be implemented in AES?
What is the purpose of the ShiftRows transformation in the AES algorithm?
What is the purpose of the ShiftRows transformation in the AES algorithm?
How does the InvShiftRows transformation differ from the ShiftRows transformation?
How does the InvShiftRows transformation differ from the ShiftRows transformation?
What is the purpose of the MixColumns transformation in the AES algorithm?
What is the purpose of the MixColumns transformation in the AES algorithm?
What is the relationship between the forward and inverse transformations in the AES algorithm?
What is the relationship between the forward and inverse transformations in the AES algorithm?
Which of the following is true about the ShiftRows transformation?
Which of the following is true about the ShiftRows transformation?
What is the purpose of the InvShiftRows transformation in the AES algorithm?
What is the purpose of the InvShiftRows transformation in the AES algorithm?
What is the purpose of the ShiftRows transformation in AES?
What is the purpose of the ShiftRows transformation in AES?
How is the Inverse ShiftRows transformation performed?
How is the Inverse ShiftRows transformation performed?
Which transformation is its own inverse in AES?
Which transformation is its own inverse in AES?
What is the purpose of the MixColumns transformation in AES?
What is the purpose of the MixColumns transformation in AES?
What is the purpose of the forward and inverse transformations in AES?
What is the purpose of the forward and inverse transformations in AES?
What is the purpose of the AddRoundKey transformation in AES?
What is the purpose of the AddRoundKey transformation in AES?
