Cryptography Flashcards
Which of the following does not apply to a hashing algorithm?
One-way
Long key size
Variable-length input with fixed-length output
One-way
long key sizes are not applicable to hashing algorithms
During a training session, you want to impress upon users the serious nature of security and, in particular, cryptography. To accomplish this, you want to give them as much of an overview about the topic as possible. Which government agency should you mention is primarily responsible for establishing government standards involving cryptography for general-purpose government use?
NSA
NIST
IEEE
NSA
The National Security Administration is responsible for cryptography in the U.S. government, even though those standards by then become NIST standards
You are responsible for e-commerce security at your company. You want to use the most widely implemented asymmetric algorithm available today. Which of the following is the most widely used asymmetric algorithm today?
RSA
AES
3DES
RSA
RSA is the most widely used asymmetric cipher today, though ECC is quickly becoming more widely used
You’re a member of a consortium wanting to create a new standard that will effectively end all spam. After years of meeting, the group has finally come across a solution and now wants to propose it. The process of proposing a new standard or method on the Internet is referred to by which acronym?
WBS
X.509
RFC
RFC
The Request for Comment is how you propose a new standard
Mary claims that she didn’t make a phone call from her office to a competitor and tell them about developments at her company. Telephone logs, however, show that such a call was placed from her phone, and time clock records show that she was the only person working at the time. What do these records provide?
Confidentiality
Authentication
Nonrepudiation
Nonrepudiation
This is nonrepudiation
Mercury Technical Solutions has been using SSL in a business-to-business environment for a number of years. Despite the fact that there have been no compromises in security, the new IT manager wants to use stronger security than SSL can offer. Which of the following protocols is similar to SSL but offers the ability to use additional security protocols?
TLS
SSH
RSH
TLS
TLS is the replacement for SSL
MAC is an acronym for what as it relates to cryptography?
Media access control
Mandatory access control
Message authentication code
Message authentication code
This is a Message Authentication Code
You’ve been brought in as a security consultant for a small bicycle manufacturing firm. Immediately, you notice that they’re using a centralized key-generating process, and you make a note to dissuade them from that without delay. What problem is created by using a centralized key-generating process?
Network security
Key transmission
Certificate revocation
Key transmission
Key transmission is a concern
You need to encrypt your hard drive. Which of the following is the best choice?
DES
RSA
AES
AES
For a hard drive, you want a symmetric cipher and AES is more secure than DES
As the head of IT for MTS, you’re explaining some security concerns to a junior administrator who has just been hired. You’re trying to emphasize the need to know what is important and what isn’t. Which of the following is not a consideration in key storage?
Environmental controls
Physical security
Hardened servers
Environmental controls
Environmental controls would be the least important issue
What is the primary organization for maintaining certificates called?
CA
RA
LRA
CA
This is a certificate authority
Due to a breach, a certificate must be permanently revoked, and you don’t want it to ever be used again. What is often used to revoke a certificate?
CRA
CYA
CRL
CRL
A Certificate Revocation List should be used
Which organization can be used to identify an individual for certificate issue in a PKI environment?
RA
LRA
PKE
RA
The Registration Authority identifies an individual for issuing a certificate by a Certificate Authority
Kristin from Payroll has left the office on maternity leave and won’t return for at least six weeks. You’ve been instructed to suspend her key. Which of the following statements is true?
In order to be used, suspended keys must be revoked.
Suspended keys don’t expire.
Suspended keys can be reactivated.
Suspended keys can be reactivated.
The key will have to be re-activated
What document describes how a CA issues certificates and for what they are used?
Certificate policies
Certificate practices
Revocation authority
Certificate policies
The certificate policy describes how a certificate can be used
