Question: Suppose we are using a block cipher in OFB ( Output Feedback ) mode of operation. By error, one of the bits of the first
Suppose we are using a block cipher in OFB Output Feedback mode of operation. By error, one of the bits of the first byte of the plaintext gets flipped. We don't notice this and do the encryption and send the message to its destination. What happens to the recovered plaintext at the receiver end?
a
bit of the first block and the entirety of the second block of the decrypted plaintext will be invalid.
b
All of the blocks of the decrypted plaintext will be invalid.
c
The entirety of the first block and bit of the second block of the decrypted plaintext will be invalid.
d
Only bit of the first block of decrypted plaintext will be invalid.
e
The entirety of only the first two blocks will be invalid.
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