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