CSF Practice - Chapter 4 to 7

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

• Salting

• Random string of characters added to two similar passwords

  before hashing resulting in the two passwords having a different

  hash result.

• HMAC

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

• Hashing

• 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 _______ 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)

Answer explanation

X.509

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

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