Hi, can anyone please help me in this?
5. Ecila and Selrahc are exchanging messages over an insecure line. Yrollam is listening in between and has the ability to modify, delete, or insert messages. How can Ecila and Serahc ensure each of the following? Explain the process and the technique(s) for each of the problems below:
a. If Selrahc receives a message from Ecila, the contents have not been modified by Yrollam.
b. If Selrahc receives a message from Ecila, it is not a replay of an older message previously sent by Ecila,
c. If Ecila sends three messages to Selrahc, Yrollam cannot delete the second message without getting detected by Ecila.
d. Yrollam cannot insert a fake message from Ecila to Selrahc (i.e., Yrollam sends the fake message to Selrahc and pretend that this is actually fro Ecila).

Answers

Answer 1

To ensure the security and integrity of their communication, Ecila and Selrahc can employ various techniques such as message authentication, message sequencing, and digital signatures. Here's how they can address each of the mentioned problems:

a. To ensure that the contents of the message sent by Ecila have not been modified by Yrollam, they can use Message Authentication Code (MAC). MACs are cryptographic checksums that are generated and appended to the message. MAC is generated by applying cryptographic functions over the message using a secret key that is known only to the sender and the receiver. The receiver verifies the MAC by recalculating it using the received message and the secret key.

b. To ensure that Selrahc receives a message from Ecila that is not a replay of an older message previously sent by Ecila, they can use a nonce. A nonce is a random number used only once. The sender includes a nonce in every message it sends. The receiver keeps track of the nonces it has seen and rejects any message that has a nonce it has already seen.

c. To ensure that Yrollam cannot delete the second message without getting detected by Ecila, they can use a digital signature. A digital signature is created by applying cryptographic functions to the message and a private key that is known only to the sender. The digital signature is appended to the message. The receiver verifies the digital signature using the message, the public key, and the digital signature.

d. To ensure that Yrollam cannot insert a fake message from Ecila to Selrahc, they can use public-key encryption. Public-key encryption uses two keys: a public key that is available to everyone and a private key that is known only to the owner. The sender encrypts the message using the receiver's public key, and the receiver decrypts the message using its private key. Yrollam does not know the receiver's private key, so it cannot create a valid message from the sender.

By combining these techniques - message authentication, message sequencing, and digital signatures - Ecila and Selrahc can enhance the security of their communication and protect against various forms of tampering or impersonation by Yrollam.

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Related Questions

Print rows and columns (10 points)
Ask the user for how many columns and then how many rows. Then ask the user for what words they like to print. Print those words in the amount of columns and rows the user wanted.

Answers

Answer:

python

Explanation:

hi again
im assuming you want this in python because you dont specify this in your question

import random

columns = input('How many columns?\n')

rows = input('How many rows?\n')

columns = int(columns)

rows = int(rows)

list_words = []

inputwords = input('Tell me words you want to print separated by spaces\n')

for word in inputwords.split():

       list_words.append(word)

table_data = []

for row in range(rows):

       placeholder_column = []

       for column in range(columns):

               placeholder_column.append(random.choice(list_words))

       table_data.append(placeholder_column)

string_of_format = ""

for iter_column in range(columns):

       string_of_format += "{: >20}"

for iter_row in table_data:

       print(string_of_format.format(*iter_row))

web-based training is most similar to which of these other training delivery methods?

Answers

Web-based training is most similar to computer-based training. Both are self-paced and delivered electronically, but web-based training is delivered via the internet.

Web-based training and computer-based training are both electronic and self-paced methods of training delivery. Computer-based training is typically delivered through a CD-ROM or other storage device, while web-based training is delivered via the internet. Both methods offer learners the ability to complete training at their own pace and on their own schedule. However, web-based training allows learners to access the training materials from any location with an internet connection, which can be more convenient for remote or mobile learners. Additionally, web-based training often includes interactive elements such as quizzes, simulations, and multimedia content, which can enhance the learning experience.

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window operating system popularly known as. 1) character user interface. 2) computer user interface. 3) graphic user interface. 4)none​

Answers

Answer:

The window operating system is popularly known as a graphical user interface(GUI)

Explanation:

older operating systems were command line based but window uses a gui

Answer:

The window operating system is popularly known as a graphical user interface(GUI)

Explanation:

The idea that money, language, education, or infrastructure creates a gap between those who have access to information technologies and those who do not.

Answers

Answer:

The Digital Divide, or the digital split, is a social issue referring to the differing amount of information between those who have access to the Internet (specially broadband access) and those who do not have access

Explanation:

If a computer has a maximum of 2N memory cells, then each address field in a machine language instruction must be ____ bits wide to enable us to address every cell.

Answers

If a computer has a maximum of 2N memory cells, where N is the number of bits used to address a memory cell, then each address field in a machine language instruction must be N bits wide.

This is because each bit in the address field can represent a unique memory cell, allowing the computer to address all 2N memory cells. For example, if a computer has a maximum of 64 memory cells (2^6), then each address field in a machine language instruction must be 6 bits wide.

If the address field was only 5 bits wide, the computer would only be able to address 32 memory cells (2^5), leaving half of the memory inaccessible. Therefore, the number of bits in the address field must be carefully considered when designing a computer system to ensure that all memory cells can be addressed.

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How could I compare the 1st letter of an element in the list of name with the letter inputted. (In Python)

How could I compare the 1st letter of an element in the list of name with the letter inputted. (In Python)

Answers

To compare the first letter of an element in a list of names with a letter inputted in Python, you can use a for loop to iterate over the list of names. For each element in the list, you can use the str.startswith() method to check if the element's name starts with the letter inputted. For example:
names = ["John", "Jane", "David", "Alex"]
letter = "J"

for name in names:
if name.startswith(letter):
print(name)

Pip is configured with locations that require tls/ssl.

Answers

If Pip is configured with locations that require TLS/SSL, it will automatically verify the SSL/TLS certificates for those locations before downloading the packages. In simple words, Pip checks the SSL/TLS certificate of the package sources before it downloads the packages to make sure they are safe and secure.

SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols that provide secure communication between two devices or endpoints. SSL/TLS protocols ensure that the data transmitted over the internet is encrypted and secure against eavesdropping and tampering by a third party.If Pip is configured with locations that require TLS/SSL, then it will use the https protocol instead of the insecure http protocol to fetch packages from the package sources.

The https protocol ensures that the communication between the server and client is secure by using SSL/TLS encryption.

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Which of the following tools would you use to deploy the settings in a security template to all of the computers in an Active Directory Domain Services domain
a. Active Directory Users and Computers
b. Security Templates snap-in
c. Group Policy Object Editor
d. Group Policy Management console

Answers

I’m guessing the answer is A

Explain why this scenario could put an organization in jeopardy of losing some of its workforce.

Situation: The IT manager decides to add a new software application to replace an older albeit less efficient software application.

Answers

Answer:

Not educating its employees on the new software.

who invented the computer?
when was it made?
can u tell me the name of the oldest computer?
when did the first laptop come out?

Answers

The computer was invented by Charles Babbage 15 February 1946Antikythera Mechanism it came out in 1981

Hope it helps you

pls mark my answer as brainliest

Answer:

1 and 2: Charles Babbage invented the computer (he was an English mechanical engineer and polymath) Charles Babbage was deemed the "father of the computer", he thought up and created the very first mechanical computer at the beginning of the 19th century.

3: the first computer was named the ubiquitous x86-powered workhorse of desktop and portable computing. All latest PCs are descendants of the earliest from IBM, the original model 5150 which made its first appearence in August 1981.

4: The first laptop computer available to the public was the Osborne. the Osborne Computer Corporation issued this exact model to the public in the year 1981. It ran at a large price of $1795. At the time of discharge, the screen was about five inches long and the keyboard was on the cover of the computer.

i did a lot of research for this, lol. hope it helps.

(i promise i did not plagerise)

Unit Test
Unit Test Active
11
12
TIME REN
16:
Which formatting elements can be included in a style Terry created?
font size, type and color
paragraph shading
line and paragraph spacing
All of the options listed above can be used to create a new style.

Answers

Answer:

d. all of the options listed above can be used to create a new style .

Explanation:

The formatting elements that can be included in a style Terry created is font size, type and color. The correct option is A.

What is formatting element?

The impression or presentation of the paper is renowned to as formatting. The layout is another word for formatting.

Most papers encompass at least four types of text: headings, regular paragraphs, quotation marks, as well as bibliographic references. Footnotes along with endnotes are also aggregable.

Document formatting is recognized to how a document is laid out on the page, how it looks, and the way it is visually organized.

It addresses issues such as font selection, font size as well as presentation like bold or italics, spacing, margins, alignment, columns, indentation, and lists.

Text formatting is a characteristic in word processors that allows people to change the appearance of a text, such as its size and color.

Most apps display these formatting options in the top toolbar and walk you through the same steps.

Thus, the correct option is A.

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jared is explaining various attacks to students in an introduction to cybersecurity class. he wants to make certain they fully understand the different attacks. what does a buffer-overflow attack do?

Answers

In an introductory cybersecurity class, Jared is describing several threats to the pupils. A buffer-overflow attack overflows a buffer by inserting more data into it than it can hold.

What is the purpose of cyber security?

Definition. The term "cyber security" refers to a group of techniques, tools, and procedures that work together to defend computer systems, networks, and material against hacker attacks and illegal access.

Coding is it used in cyber security?

Today, coding is a crucial talent in practically every area of technology, and cybercrime is no different. Discover the best programming skills for security specialists. Nowadays, coding is a necessary ability in practically every area of technology, and cyberattacks is no different.

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Customer Service. Is an organization's ability to _______ customers

Answers

Answer:

Serve

Explanation:

Customer Service

Answer:

At its most basic level, customer service is an organization's ability to supply their customers' wants and needs. But this definition leaves out the transactional nature of customer service, and it's this transactional aspect that drives customer loyalty.

Explanation: Hope this helps!

_____the DNS is the process of clearing the DNS cache of old entries, some of which may be stale or poisoned.

Answers

The fundamental problems of the DNS protocol that make it vulnerable to DNS cache poisoning attacks include Predictable transaction IDs: The DNS protocol uses transaction IDs to match responses to requests. However, these IDs can be predictable, allowing an attacker to spoof DNS responses.

The DNS protocol does not have a built-in mechanism for authenticating responses. This makes it easier for an attacker to inject malicious DNS responses.

DNS servers often use recursive queries to find the IP address of a domain name. This can create an opportunity for an attacker to poison the cache by sending a malicious response before the legitimate response is received.

DNS cache entries can remain in the cache for a long time, depending on the Time-to-Live (TTL) value. If an attacker is successful in poisoning the cache, the malicious entry can persist for an extended period.

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Definenation monitor​

Answers

Answer:

A computer monitor is an output device that displays information in pictorial form. A monitor usually comprises the visual display, circuitry, casing, and power supply. .

prolog modify the log program so that the user can specify the destination file of the logged output.

Answers

To modify the Prolog program, we have to introduce an additional argument to the logging predicate and representing the file name or file handle.

Doing thius, the user will provide the desired destination when calling the logging predicate.

How can the Prolog program be modified?

To enable the user to specify the destination file for the logged output in Prolog, you need to add an extra argument to the logging predicate which represents the file name or file handle.

By including the argument, the user can pass the desired destination as a parameter when invoking the logging predicate. This modification gives the user flexibility to choose the specific file for the logged output which allows them to control where the log information is stored.

Full question:

In Prolog. Modify the log program so that the user can specify the destination file of the logged output.

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does fake news impact our lives​

Answers

Answer:

No

Explanation:

because, its fake and not real, and only rean news has a big impact in our lives because we know what is happening around the world

Which tab is used to configure editing restrictions in Word 2016? Review References Security Developer

Answers

Answer:

Review Tab is the correct answer to the given question .

Explanation:

Giving the permission to file in word 2016

Click on the Review tab and select the restrict tab .Chose the option allow this type of editing .After that choose the option No changes .Pick the section of the document they want to authorize the adjustments.After that there are multiple option are seen select accordingly  as user need and press ok button .Click on the start permission there is option is seen Start enforcement and press the button option start Enforcing Protection.After that feeding the password if the user need the password is in encrypt form then press encrypt option and click ok .

If the user need to read the file

Click on the Review tab and select the restrict tab .After that choose the option "Stop Protection" .Giving the password you are feeding in the permission of file  .Finally the user will edit the document

Answer:

It's D developer!!!

Explanation:

Took the test and got it right!!!!!!!

is it bad to leave your laptop plugged in all the time

Answers

Answer:

no, its not bad. the only way its bad is if your computer has something wrong with it.

Explanation:

what advice can you give to learners to achieve their goals​

Answers

Answer:

Never give up, take your time, don't get distracted easily, lock your electronics in a box until you finish your work.

Reach for the stars! Always go the extra mile! Never give up!

In a sentence

If you wanted to become a police officer and you had to read boring books and you wanted to give up, but always think "I should always push myself past my limits, If I gave up then how would i know what I could have become?

Trademark

Owned by me

a packet of gum, an office cleaning, lawn care maintenance, payroll management, and telecommunications are all examples of what?

Answers

A packet of gum, an office cleaning, lawn care maintenance, payroll management, and telecommunications are all examples of goods and services.

Products or materials are examples of tangible commodities that can be purchased and sold as goods. They are touchable, transportable, and have physical characteristics. Items like a pack of gum, a car, or a piece of furniture are examples of goods.

Services are intangible goods that one party does or offers to another. They are not touchable or graspable since they lack physical attributes. Services can be provided for things like office cleaning, lawn care, payroll administration, and telecommunications.

The two basic types of economic production are goods and services, which are frequently produced and consumed simultaneously. Many businesses produce and sell both goods and services, and consumers often purchase a combination of goods and services in order to meet their needs and wants.

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PLS ANSWER NOW QUICKLY!!!!
If the car can recognize and have an understanding or estimation of more information about the people involved should that influence the decision that is made? To clarify with an example: if the car’s software can recognize that a pedestrian is a mother with two children in a stroller or a pregnant woman, should that be factored into the decision that is made by the software? Why or why not?

Answers

Ethical implications of recognizing vulnerable individuals in autonomous vehicle decision-making

The use of additional information in the decision-making process of an autonomous vehicle raises ethical and moral questions. Recognizing and prioritizing the safety of vulnerable individuals at risk of injury in an accident ensures safety.

Using such information could raise concerns about privacy, bias, and discrimination. The technology used to recognize and understand pedestrians may need to be more accurate and could lead to incorrect decisions or unintended consequences.

Relying on this information could perpetuate existing biases and inequalities, such as prioritizing the safety of specific individuals over others based on their perceived vulnerability.

The decision to factor should consider the potential benefits and risks and an ethical framework that prioritizes safety while considering the rights and dignity of individuals.

what is the maximum file size that can be stored in a fat32 partition?

Answers

It's 4 GB that can be stored

The maximum file size that can be stored in a fat32 partition is 4 GB.

What is fat32?

The FAT32 file system was initially released to the public in 1996 by Microsoft, who incorporated it into Windows 95 OSR2 and MS-DOS 7.1. If a file is more than 4GB, it cannot be moved to a FAT32 partition.

Max partition size for FAT32 is 2TB. You wouldn't be able to format a 3TB drive or bigger as a single FAT32 partition. The files kept on a disk drive are organized using the FAT32 disk format or filing system.

A "File Allocation Table," or FAT, is constructed at the beginning of the drive and the disk drive is segmented into addressable units called sectors. At the beginning of the drive, a "File Allocation Table," or FAT, is built so that the host computer can locate each piece of information in the file.

Therefore, a fat32 partition may accommodate files up to 4 GB in size.

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Which technology might increase the security challenge to the implementation of IoT in an enterprise environment?

Answers

In an enterprise environment, the implementation of IoT (Internet of Things) introduces various security challenges. One technology that might increase these challenges is the use of insecure wireless communication protocols.

Wireless communication protocols such as Wi-Fi, Zigbee, and Bluetooth are commonly used to connect IoT devices within an enterprise. However, these protocols may not always have robust security measures in place. This could lead to potential vulnerabilities in data transmission, allowing unauthorized access to sensitive information and enabling cyber-attacks. Furthermore, IoT devices often come with default or weak passwords, making them susceptible to brute-force attacks. In an enterprise setting, compromised devices can lead to significant data breaches, affecting both the organization and its customers. To mitigate these risks, enterprises must invest in robust security measures, such as secure authentication and encryption techniques, proper device management, and regular security updates. By addressing these security challenges, businesses can successfully implement IoT technology while maintaining a safe and secure environment.

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difference between electrical and electronic devices

Answers

Answer:

The differences between electrical and electronic devices is that electrical uses as energy for necessary purposes, while electronic devices are being manipulated by the electrons that are inside of the device's battery :3

Explanation:

:3

the difference between electrical and electronic devices is that the electrical devices convert the electrical energy into the other form of energy like heat. light etc where as electronic devices control the flow of electrons for performing the particular task

Replace the nulls values of the column salary with the mean salary.

Answers

When data is combined across lengthy time periods from various sources to address real-world issues, missing values are frequently present, and accurate machine learning modeling necessitates careful treatment of missing data.

What is Column salary?

One tactic is to impute the missing data. A wide range of algorithms, including simple interpolation (mean, median, mode), matrix factorization techniques like SVD, statistical models like Kalman filters, and deep learning techniques.

Machine learning models can learn from partial data with the aid of approaches like replacement or imputation for missing values. Mean, median, and mode are the three basic missing value imputation strategies.

The median is the middle number in a set of numbers sorted by size, the mode is the most prevalent numerical value for, and the mean is the average of all the values in a set.

Thus, When data is combined across lengthy time periods from various sources to address real-world issues, missing values are frequently present, and accurate machine learning modeling necessitates careful treatment of missing data.

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Which of the following is hardware or software that monitors and controls network traffic to prevent security breaches?
O trojan horse
O firewall
O anti-malware
O keylogger
Need answer now!!!!!

Answers

Answer:

Firewall

Explanation:

A trojan horse and keylogger are types of malware. While an anti-malware software may come with a firewall built in, the firewall is still the thing monitoring network traffic.

James wants to buy a pair of pants for $60.
When he went to the store he found that the
price was marked down by 20%. How much do
they cost now?

Answers

They cost 48. Used a calculator

How does I/O device work with the file?

Answers

I/O (Input/Output) devices provide a means of interacting with files in a computer system. When an I/O device is used to access a file, the device sends a request to the operating system to read or write data from or to the file.

The operating system then performs the necessary operations to access the file, which may involve locating the file on the storage device, reading or writing data to or from the file, and managing the file system structures that track the location and status of the file.

The I/O device can then access the data from the file or write data to the file as necessary. This allows users to interact with files using a wide range of devices, including keyboards, mice, scanners, printers, and other devices that can send and receive data to and from the computer system.

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What does the revolver do?

sends the domain name and requests the IP address

sends the IP address and requests the content of the web page

sends the IP address and requests the domain name

sends the domain name and requests the content of the web page

Answers

Answer:

last one

Explanation:

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