age into a form that is unreadable to unauthorized individuals-that is,to anyone without the tools to convert the encrypted message back to its original format.
Question 128. Define Decryption ?
Decryption is the process of converting the cipher text into a message that conveys readily understood meaning.
Question 129. What Is Public Key Infrastructure (pki)?
PKI or Public Key Infrastructure
Public Key Infrastructure is the entire set of hardware, software, and cryptosystems necessary to implement public key encryption
PKI systems are based on public-key cryptosystems and include digital certificates and certificate authorities (CAs) and can:
- Issue digital certificates
- Issue crypto keys
- Provide tools to use crypto to secure information
- Provide verification and return of certificates.
Question 130. What Are The Pki Benefits ?
PKI protects information assets in several ways:
Question 131. How E-mail Systems Are Secured?
Encryption cryptosystems have been adapted to inject some degree of security into e-mail:
S/MIME builds on the Multipurpose Internet Mail Extensions (MIME) encoding format by adding encryption and authentication
Privacy Enhanced Mail (PEM) was proposed by the Internet Engineering Task Force (IETF) as a standard to function with the public key cryptosystems
PEM uses 3DES symmetric key encryption and RSA for key exchanges and digital signatures
Pretty Good Privacy (PGP) was developed by Phil Zimmerman and uses the IDEA Cipher along with RSA for key exchange.
Question 132. What Are The Seven Major Sources Of Physical Loss?
- Temperature extremes
- Living organisms
- Energy anomalies.
Question 133. What Is A Secure Facility?
A secure facility is a physical location that has been engineered with controls designed to minimize the risk of attacks from physical threats.
A secure facility can use the natural terrain; traffic flow, urban development, and can complement these features with protection mechanisms such as fences, gates, walls, guards, and alarms.
Question 134. What Are The Controls Used In A Secure Facility?
Walls, Fencing, and Gates
Dogs, ID Cards, and Badges
Locks and Keys
Alarms and Alarm Systems
Walls and Doors.
Question 135. What Are The Functions Of Chief Information Security Officer?
The CISO performs the following functions:
- Manages the overall InfoSec program
- Drafts or approves information security policies
- Works with the CIO on strategic plans, develops tactical plans, and works with security managers on operational plans
- Develops InfoSec budgets based on funding
- Sets priorities for InfoSec projects & technology
- Makes decisions in recruiting, hiring, and firing of security staff
- Acts as the spokesperson for the security team.
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