In openssl, we can use the following commands to encrypt/decrypt a file. Sopenssl enc-aes-256-ecb-nosalt-e-in plain.txt-out cipher.bin (use AES-256-ECB to encrypt the file plain.txt and store the ciphertext as cipher.bin) Sopenssl enc-aes-256-ecb-nosalt-d-in cipher.bin (use the same scheme to decrypt the ciphertext cipher.bin) -aes-256-ecb" option specifies the version of the AES algorithm which uses 256-bit keys. a. The encryption algorithm aes-256-ecb is a 128-bit block cipher. Design an experiment to verify it. b. Create a >64 bytes text file plain.txt and use the above command to generate the cipher.bin. Use the ghex2 or hexedit utility to change 1 bit of cipher.bin and save the result as cipher1.bin. Execute the same command above to decrypt cipher1.bin. How much information can you recover? Explain why