CSF Practice - Chapter 4 to 7

Match the terms to their correction explanation. (Chapter 5)

• HMAC

• Random string of characters added to two similar passwords

  before hashing resulting in the two passwords having a different

  hash result.

• Hashing

• It is relatively easy to compute but significantly harder to reverse.

• Salting

• Combines a cryptographic hash function with a secret key.

There are many hashing algorithms widely used today. Identify two that are most popular. (Chapter 5)

• Message Digest 5 or MD5

• Secure Hash Algorithm or SHA

• AES (Advanced Encryption Standard)

• RSA (Rivest-Shamir-Adleman)

Hashing is a tool that ensures data integrity by using a one-way mathematical function to produce a hash value. Identify all properties of a cryptographic hash function. (Chapter 5)

• Input can be any length.

• Output has a fixed length.

• It is one way and is not reversible.

• Two different input values will always result in different hash values.

Salting is a type of data integrity control use to make hashing more secure. Describe the situation in which salting is used. When two users have the (a)   password. (Chapter 5)

Digital signatures provide the same functionality as handwritten signatures for electronic documents. Describe all the functionalities of a digital signature. (Chapter 5)

• To determine if it is edited.

• To check authenticity.

• To check integrity.

• Cannot be repudiated.

Identify the standard used for the construction of digital certificates. (Chapter 5)

(a)  

Answer explanation

X.509

Which one of the three principles of security does a digital certificate provides for the receiver? (Chapter 5)

(a)  

Database validation rule helps to ensure the completeness, accuracy and consistency of data. State all criteria used in a validation rule. (Chapter 5)

• Size of data.

• Format of data.

• Consistency of codes.

• Range of data.

• Check digit for error detection.

Explain the Five Nine? Mean that ____________________. It also means that _________________. (Chapter 6).

• systems and services are available 99.999% of the time

• both planned and unplanned downtime is less than 5.26 minutes per year.

• systems and services are available 100% of the time

• both planned and unplanned downtime is more than 5.26 minutes per year.

Identify all the industries or services that that requires five nine. (Chapter 6)

• Finance industry

• Healthcare facilities

• Public safety industry

• Retail industry

• Food & Beverage Industry