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Suppose that the message Pay $ 1 0 0 0 to Bob is encrypted using a stream cipher as 7 e 4 d 6 c

Suppose that the message

Pay $

1000

to Bob

is encrypted using

a stream cipher as

7

4

6

73

5240

948

86951

29481

5 (

in hex

) .

It is known that the plaintext

letters are encoded as

8 -

bit ASCII characters. Provide a modified ciphertext such that its decryption

would read

Pay $

9000

to Bob

.

Explain your answer

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