The major weaknesses of the inverse CBC mode of DES, for which encryption transformation is given below are thatA. decryption is not possibleB. IV must be kept secretC$.$ encryption is more time consuming than decryptionD. encryption cannot be parallelizedE. the same plaintext block is always encrypted to the same ciphertext blockF. the mode is not suitable for a fast random read access to the block mjG$.$ exhaustive key search is easy to mountH. analysis of the ciphertext may reveal patterns $($e$.$g$.,$ repeating blocks$)$ in the plaintextI. decryption circuit takes more area than the encryption circuit