how many padding bits must be added to a message of 20 characters if 8 bit ASCII is used for encoding and block cipher accepts blocks of 32 bit?
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Encoding 100 characters using 8-bit ASCII results in an 800-bit message. The plaintext must be divisible by 64. If MI and IPadl are the length of the message and the length of the pading 32 mod 64. This means that 32 bits of pading (for example, 0's need to be added to the message.
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