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28 encryptions per revocation. 8 End of Media Key Block Record Table 3-10 – End of Media Key Block Record Format Bit Byte 0 1 2 3 4 … Length-1 7 6 5 4 3 2 1 0 Record Type: 0216 Record Length Signature Data A properly formatted MKB shall contain an End of Media Key Block Record. When a device encounters this Record it stops processing the MKB, using whatever Km value it has calculated up to that point as the final Km for that MKB (pending possible checks for correctness of the key, as described previously).

The host sends a request to the drive to read the Binding Nonce from the Protected Area. The command data contains the LBA extent for the user data file that is associated with the Protected Area Data. 3. Upon request from the host, the drive reads the Binding Nonce from the designated Protected Area specified in step 2. 4. 3. Dm = CMAC(BK, Binding_Nonce || Starting_LBA) 5. The drive sends the Binding Nonce and the message authentication code Dm calculated in step 4 to the host. 6. 3. Hm = CMAC(BK, Binding_Nonce || Starting_LBA) 7.

The DISC STRUCTURE Data Length field specifies the length in bytes of the following DISC STRUCTURE data that is available to be transferred to the host. The DISC STRUCTURE Data Length value does not include the DISC STRUCTURE Data Length field itself. The Total Packs field reports the total number of MKB Packs that are available for transfer to the host, which is calculated by dividing total MKB data length by 32,768 with counting fractions as one. The Address field in the command specifies which of the available MKB Packs shall be read.

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