30. Show the 20-bit key stream generated from the LFSR in Figure 5.25 if the seed is 1 use excel to draw the table for the first 20 bits of the output stream. Figure 5.25 LFSR for Example 5.19 Key stream generator Output (k) Plaintext - Ciphertext Encryption 31. The maximum period length of an LFSR is 32. How many bits does the shift register have

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30. Show the 20-bit key stream generated from the LFSR in Figure 5.25 if the seed is 1110
use excel to draw the table for the first 20 bits of the output stream.
Figure 5.25 LFSR for Example 5.19
Key stream generator
Output (k)
Plaintext
→ Ciphertext
Еncryption
31. The maximum period length of an LFSR is
32. How many bits does the shift register have?
Transcribed Image Text:30. Show the 20-bit key stream generated from the LFSR in Figure 5.25 if the seed is 1110 use excel to draw the table for the first 20 bits of the output stream. Figure 5.25 LFSR for Example 5.19 Key stream generator Output (k) Plaintext → Ciphertext Еncryption 31. The maximum period length of an LFSR is 32. How many bits does the shift register have?
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