<Tr> <Td> Propagating CBC (PCBC) </Td> <Td> Y = PlainText XOR (Ciphertext XOR PlainText) </Td> <Td> F (Y, key); Ciphertext = IV </Td> </Tr> <Tr> <Td> Cipher Feedback (CFB) </Td> <Td> Y = Ciphertext </Td> <Td> Plaintext XOR F (Y, key); Ciphertext = IV </Td> </Tr> <Tr> <Td> Output Feedback (OFB) </Td> <Td> Y = F (Key, Y); Y = IV </Td> <Td> Plaintext XOR Y </Td> </Tr> <Tr> <Td> Counter (CTR) </Td> <Td> Y = F (Key, IV + g (i)); IV = token (); </Td> <Td> Plaintext XOR Y <P> </P> </Td> </Tr>

Which of the following statement is not correct about using des in cbc mode