Question: The ciphertext . ZYHM . ! was encrypted with the LFSR - Stream Cipher. Knowing that the message begins with the letters mr , determine

The ciphertext .ZYHM.! was encrypted with the LFSR-Stream Cipher. Knowing
that the message begins with the letters mr, determine the key, the linear recurrence
formula, and then decrypt the message.
The ciphertext . ZYHM . ! was encrypted with the

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