Chapter 9 Encrypting Volumes. FIGURE 9.0.F01: A hard drive volume with full-disk encryption (FDE).

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Presentation transcript:

Chapter 9 Encrypting Volumes

FIGURE 9.0.F01: A hard drive volume with full-disk encryption (FDE).

TABLE 9.0.T01: Effectiveness of access control and encryption

TABLE 9.0.T02: Policy statements for an unencrypted volume

TABLE 9.0.T03: Policy statements for volume encryption

FIGURE 9.0.F02: A block cipher encrypts data in fixed-sized blocks.

FIGURE 9.0.F03: Triple DES encryption.

FIGURE 9.0.F04: Encryption failure using a block cipher. Courtesy of Dr. Richard Smith

FIGURE 9.0.F05: Identical blocks encrypt to identical ciphertext.

FIGURE 9.0.F06: Using a mixing mode with a block cipher. Courtesy of Dr. Richard Smith

FIGURE 9.0.F07: Key stream made with OFB (output feedback mode).

FIGURE 9.0.F08: Include the IV with the ciphertext when required.

FIGURE 9.0.F09: Mode encryption diagram: Encrypting with OFB.

FIGURE 9.0.F10: Key stream with CTR—the counter mode.

FIGURE 9.0.F11: Mode encryption diagram for CFB (cipher feedback mode).

FIGURE 9.0.F12: Mode encryption diagram for CBC (cipher block chaining).

FIGURE 9.0.F13: Mode decryption diagram for CBC.

FIGURE 9.0.F14: Full disk encryption in software.

FIGURE 9.0.F15: Password prompt to mount an encrypted volume. Screen shot reprinted with permission from Apple Inc.

FIGURE 9.0.F16: Encrypting disk data with AES and Counter mode.

FIGURE 9.0.F17: Sector encryption with CBC and ESSIV.

FIGURE 9.0.F18: XTS mode to encrypt data on a disk sector.

FIGURE 9.0.F19: Internal functions of a self-encrypting drive.

FIGURE 9.0.F20: Block diagram of a self-encrypting drive controller.

FIGURE 9.0.F21: Self-encrypting drive controller’s state diagram.

FIGURE 9.0.F22: Preboot authentication with software encryption.

FIGURE 9.0.F23: Passphrase interception risks.