Problem 5 (a) The ciphertext ONXM was encrypted by a Hill cipher with a 2 x 2 matrix The plaintext is null Find the encryption matrix (b) Suppose the ciphertext is PNXM and the plaintext is still null Find the encryption matrix Note that the first column of the matrix is changed What does it mean Is it a good or a bad property of a cipher Discuss Problem 5 (a) The ciphertext ONXM was encrypted by a Hill cipher with a 2 x 2 matrix The plaintext is null Find the encryption matrix (b) Suppose the ciphertext is PNXM and the plaintext is still null Find the encryption matrix Note that the first column of the matrix is changed What does it mean Is it a good or a bad property of a cipher Discuss

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Problem 5   (a) The ciphertext ONXM was encrypted by a Hill cipher with a 2 x 2 matrix  The plaintext is null  Find the encryption matrix  (b) Suppose the ciphertext is PNXM and the plaintext is still null  Find the encryption matrix  Note that the first column of the matrix is changed  What does it mean  Is it a good or a bad property of a cipher  Discuss  Problem 5   (a) The ciphertext ONXM was encrypted by a Hill cipher with a 2 x 2 matrix  The plaintext is null  Find the encryption matrix  (b) Suppose the ciphertext is PNXM and the plaintext is still null  Find the encryption matrix  Note that the first column of the matrix is changed  What does it mean  Is it a good or a bad property of a cipher  Discuss

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Problem 5:. (a) The ciphertext ONXM was encrypted by a Hill cipher with a 2 x 2 matrix. The plaintext is null. Find the encryption

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