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Which type of encryption technology has the broadest platform support to protect operating systems?

Which type of encryption technology has the broadest platform support to protect operating systems?
A . software
B . hardware
C . middleware
D . file-level

Answer: A

Explanation:

Much commercial and free software enables you to encrypt files in an end-user workstation or mobile device. The following are a few examples of free solutions:

+ GPG: GPG also enables you to encrypt files and folders on a Windows, Mac, or Linux system. GPG is free.

+ The built-in MAC OS X Disk Utility: D isk Utility enables you to create secure disk images by encrypting files with AES 128-bit or AES 256-bit encryption.

+ TrueCrypt: A free encryption tool for Windows, Mac, and Linux systems.

+ AxCrypt: A f ree Windows-only file encryption tool.

+ BitLocker: Full disk encryption feature included in several Windows operating systems.

+ Many Linux distributions such as Ubuntu: A llow you to encrypt the home directory of a user with built-in utilities.

+ MAC OS X FileVault: Supports full disk encryption on Mac OS X systems.

The following are a few examples of commercial file encryption software:

+ Symantec Endpoint Encryption

+ PGP Whole Disk Encryption

+ McAfee Endpoint Encryption (SafeBoot)

+ Trend Micro Endpoint Encryption

Source: Cisco Official Certification Guide, Encrypting Endpoint Data at Rest, p.501

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