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Security Warrior by Anton Chuvakin, Cyrus Peikari

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Third-Party Encryption

In certain cases, such as in protecting highly sensitive data, some administrators opt to use an additional third-party add-on for encryption. A good example of this is Encryption Plus Hard Disk . EP Hard Disk is a program that encrypts entire disks or selected partitions at the disk driver level so that normal applications can use the secure EP Hard Disk services transparently.

Table 14-1 shows the EP Hard Disk application components, the main user-visible functions within those components, and the user role expected to use each function.

Table 14-1. EP Hard Disk component names, function names, and role names

Application component

Application function

Intended user

User Program

Disk encryption

User

 

User logon

 
 

Authenti-Check or One-Time Password recovery

 
 

Recovery

 
 

Administrator logon

Local administrator

  

Corporate administrator

Administrator Program

Administrator logon

EP Hard Disk administrator

 

Configuration update

EP Hard Disk administrator

Recovery tool

Recovery

Local administrator

  

Corporate administrator

Summary of Functionality

The data written to and read from the partition or disk is encrypted and decrypted on the fly as required, driven by operating system use of the storage device. The encryption algorithm used is the Advanced Encryption Standard (AES) in Cipher Block Chaining mode with 256-bit keys. The Disk Key, which is used to encrypt the data on the disk, is randomly generated and stored encrypted under the Disk Key Encryption Key (Disk KEK). The Disk KEK ...

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