CMIS 427 Exam 1

What is the R language equivalent of the describe() function in Python ?

summary()

Symmetric key transmission requires

a secure communications channel

Which of the following is the correct statement for Moore's Law ?

The computing power doubles every 18 months while the costs stay constant.

Approximately how long would it take to break a 64-bit key today with a powerful computer

hours or days

Common statistical measures of dispersion are: (check all that apply)

A. Mean

B. Standard Deviation

C. Correlation

D. Variance

B. Standard Deviation

D. Variance

What does TLD stand for ?

Top Level Domains

Kerckhoffs' Principle states that the all details, including algorithms, of the secure system and the key should not be known to an attacker

False

Data can deceive when the sampling method is

not representative of the target population

Which class of IP address is reserved for future use or research and development purposes ?

Class E

The integers in the pair {8, 15} are co-prime or relative-prime

True

Assume we are using a Caesar Cipher and we are shifting by 3 positions. In other words, k = 3. What is the cipher text for plaintext "BOYS" ?

ERBV

In 2016 JP Morgan suffered $6 billion in losses partly attributed to

Use of models based on multiple Excel spreadsheets and error prone manual operations

Ciphertext is

encrypted text

In encryption using modulo operations, a remainder is NOT unique

True

in data analysis, volume, velocity and variety refers to

big data

Bribing, blackmailing, tricking are examples of ____________________________ .

Social Engineering Attacks

Cryptography is

Science of secret writing to hide meaning in a message

C.

the same as Cryptology

D.

Is a device to protect and secure banks

A long key can prevent a social engineering or implementation attacks.

False

What is the statistical measure that is always between -1 and +1 ?

Correlation Coefficient

___________________ is the science and sometimes art of breaking cryptosystems.

Cryptanalysis

The remainder from the modulo operation on the result of the addition (+) or multiplication (x) operations from two values from an Integer Ring, can be outside the Integer Ring

False

the greatest common divisor (gcd) of the integer pair (a,m) is

the largest integer that divides both numbers in the pair

Which of the following is the suggested way to import the data frame package commonly used in the Python language?

import pandas as pd

In early 1960, the research agency of Department of Defense, United States created an experimental network to have the computers interconnected so that they can communicate even in case of emergencies. Whats was that network called at the time of inception ?

ARPANET

You should always declare a variable before using it in Python language.

False

In encryption, the key space refers to

the set containing all possible keys

What are two additions, discussed in class, to the CIA triad for security and are also important for e-commerce?

Authentication and Non-repudiation

A column in a Data Frame can hold elements of different data types.

False

In modulo arithmetic, the remainder r = 5. What values of the pair {a,m} shown below can produce this remainder

{5,11}

Doubling the length of an encryption key from 64 bits to 128 bits ..

Exponentially increases difficulty and makes it impossible today

Modulo operation only considers the

remainder

What are the two parts of an IP address?

Network and Host

The articles on quantum computing suggest that quantum computing will definitively produce unbreakable cryptosystems

False

Ransomware attacks typically

Encrypt data files in the target network

______________ seems to originate from one source where in reality it has been sent from another source. Fill in the blank with the correct answer.

A spoofed email

An IP address contains four octets. What is the maximum possible decimal system value for an octet?

255

Symmetric encryption uses

the same encryption key used by the sender is used for decryption

The following are measures of dispersion

Variance, Standard Deviation

Nonrepudiation means

someone such as a buyer cannot deny an action such as the purchase of a good

In general, a robust encryption system tries to ___________ the key space

increase

The type of injection breach where the attacker transmits malign code into content from otherwise untrustworthy websites is called ____________________ .

Cross-Site Scripting

For encryption, the modulo operation relies on the set of real numbers

False

How are logical blocks or sections of code separated and identified in python?

Consistent Indentation

With a modulus of m, the accepted highest value integer in its Integer Ring is m-1

True

A type I error occurs when you get a

false positive

In a modulo operation where a = 7, and the modulus m = 13, the remainder r =

7

According to Kerckhoffs' Principle the cryptosystem should be secure even if the attacker knows

the encryption and decryption algorithms

_____________________ aims to shut down a service or network, making it unreachable to intended users by crushing the victim with traffic load or flooding it with data.

A DDoS attack

A Multiplicative Inverse of a denoted as a-1 = 9 when Modulus m = 26 and a = 3

True

Which of the following options represent the three components of a CIA Triad?

Confidentiality, Integrity, Availability

What procedure is initiated in converting a URL to an IP address?

Domain Name Resolution

A network containing 11 nodes has _____ connections for full connectivity, where ever node is directly connected to every other node

55