Communication Security: ShiftRows Transformation in Najaf Technical College

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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?

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?

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)?

By performing a polynomial multiplication on the column elements (D) Signup and view all the answers

What is the purpose of the Inverse ShiftRows transformation in AES?

To perform a circular left shift on the rows of the state (B) Signup and view all the answers

How can the Inverse MixColumns transformation be implemented in AES?

By performing a polynomial multiplication on the column elements (B) Signup and view all the answers

What is the purpose of the ShiftRows transformation in the AES algorithm?

To perform a circular left shift on each row of the State matrix (B) Signup and view all the answers

How does the InvShiftRows transformation differ from the ShiftRows transformation?

InvShiftRows performs a circular right shift on each row, instead of a circular left shift (B) Signup and view all the answers

What is the purpose of the MixColumns transformation in the AES algorithm?

To perform a matrix multiplication on each column of the State matrix (D) Signup and view all the answers

What is the relationship between the forward and inverse transformations in the AES algorithm?

The inverse transformations simply undo the effects of the forward transformations (A) Signup and view all the answers

Which of the following is true about the ShiftRows transformation?

It performs a circular left shift on each row of the State matrix (C) Signup and view all the answers

What is the purpose of the InvShiftRows transformation in the AES algorithm?

To undo the effects of the ShiftRows transformation by performing a circular right shift on each row of the State matrix (B) Signup and view all the answers

What is the purpose of the ShiftRows transformation in AES?

To scramble the bytes within each row of the State matrix (B) Signup and view all the answers

How is the Inverse ShiftRows transformation performed?

By shifting the bytes in each row in the opposite direction of the forward ShiftRows (A) Signup and view all the answers

Which transformation is its own inverse in AES?

AddRoundKey (C) Signup and view all the answers

What is the purpose of the MixColumns transformation in AES?

To multiply each column of the State matrix with a fixed polynomial (B) Signup and view all the answers

What is the purpose of the forward and inverse transformations in AES?

To encrypt and decrypt data, respectively (C) Signup and view all the answers

What is the purpose of the AddRoundKey transformation in AES?

To perform bitwise XOR operation between the State matrix and the round key (B) Signup and view all the answers

Communication Security: ShiftRows Transformation in Najaf Technical College

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Questions and Answers

What is the purpose of the MixColumns transformation in AES?

How is multiplication by $x$ (i.e., {02}) implemented in the MixColumns transformation?

What is the purpose of the ShiftRows transformation in AES?

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?

How can the Inverse MixColumns transformation be implemented in AES?

What is the purpose of the ShiftRows transformation in the AES algorithm?

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 relationship between the forward and inverse transformations in the AES algorithm?

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 ShiftRows transformation in AES?

How is the Inverse ShiftRows transformation performed?

Which transformation is its own inverse 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 AddRoundKey transformation in AES?

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