Supertech has produced a 10 exabyte hard drive. To support the larger capacity, they had to change the sector size to 4096 bytes. Design a counter layout like that shown in Figure 9.16 to support Counter mode encryption on this drive.

Random source 72-bit Nonce Volume's Key 72-bit Nonce Plaintext Data Block 51-bit Sector Number AES Key Encrypt Store the nonce with the volume's encryption key Data Figure 9.16 Encrypting disk data with AES and Counter mode. S-bit Block Offset Encrypted Data Block