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2 years ago

The principal object of a hash function is __________ .

Computers and Technology

1 answer:

abruzzese [7]2 years ago

8 0

Answer:

a. data integrity

Explanation:

In Computer science, a hash function can be defined as any function which is used to map data by accepting a block of data with variable length size or arbitrary size as input to produce a fixed size hash values or codes.

Generally, when a block of data (input) of arbitrary size is hashed, the resulting hash values or codes is usually smaller than the input data. Thus, hash functions are considered to be a compression of data and as a result, sometimes called compression functions. Basically, the block size of a hash function typically ranges from 128 bits to 512 bits.

Some of the properties of a hash function are;

1. Pre-image resistance: this makes it practically impossible to reverse a fixed-size hash values to its initial arbitrary size. This property helps to maintain and enhance data integrity by making it difficult or impossible for an attacker to find the input data from a hash value.

2. Second pre-image resistance: this property makes it near impossible or very difficult to determine or decode another input data from a given set of input and hash values. Also, this helps to enhance data integrity.

3. Collision resistance: this is to make possible for all hash values to have a unique value. This simply means that, with this property it would be difficult for different input data to have the same hash value. Thus, it helps to create integrity in data management.

Hence, with the aforementioned properties, the principal object of a hash function is data integrity.

Hash functions in the computer world includes;

1. Message Digest (MD): it is a 128 bit hash function and comprises of the following; MD2, MD4, MD5, and MD6.

2. Secure Hash Function (SHA): it comprises of the following; SHA-0, SHA-1,SHA-2, and SHA-3.

3. Whirlpool: it comprises of the following; Whirlpool-0, Whirlpool-T, and Whirlpool. It is primarily a 512 bit hash function.

4. RACE Integrity Primitives Evaluation Message Digest (RIPEMD): it comprises of the following versions; RIPEMD, RIPEMD-128, and RIPEMD-160.

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lara [203]

Answer:

To check if the year comes under each 100th year, lets check if the remainder when dividing with 100 is 0 or not.

Similarly check for 400th year and multiple 0f 4. The following C program describes the function.

#include<stdio.h>

#include<stdbool.h>

bool is_leap_year(int year);

void main()

{

int y;

bool b;

printf("Enter the year in yyyy format: e.g. 1999 \n");

scanf("%d", &y); // taking the input year in yyyy format.

b= is_leap_year(y); //calling the function and returning the output to b

if(b==true)

{

printf("Thae given year is a leap year \n");

}

else

{

printf("The given year is not a leap year \n");

}

bool is_leap_year(int year)

{

if(year%100==0) //every 100th year

{

if(year%400==0) //every 400th year

{

return true;

}

else

{

return false;

}

if(year%4==0) //is a multiple of 4

{

return true;

}

else

{

return false;

}

Explanation:

Output is given as image

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2 years ago

In public-key encryption, the two keys–one for coding and one for decoding–are known as ________.

Feliz [49]

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2 years ago

Wesley has to create a web banner to announce a “Back to School” sale by an online retailer. Which information should he determi

olganol [36]

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2 years ago

Read 2 more answers

Write a program whose input is two integers and whose output is the two integers swapped. Place the values in an array, where x

Aliun [14]

Answer:

import java.util.Arrays;

public class swap{

public static void main(String []args){

int [] arr = {2,4};

swapValues(arr);

}

public static void swapValues(int[] values){

int temp;

System.out.println(Arrays.toString(values));

temp=values[0];

values[0]=values[1];

values[1] =temp;

System.out.println(Arrays.toString(values));

}

Explanation:

In the program above, we created the method swapValues that receives an array of integers as parameters. in the method definition, we created a temp variable that is used to swapp the element at index 0 and index 1. Java's Arrays.to string method is used to print the array before and after the swap.

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2 years ago

A packet analyzer is a program that can enable a hacker to do all of the following EXCEPT ________. Select one: A. assume your i

bonufazy [111]

Answer:

Option (B) is the correct answer of this question.

Explanation:

Packet analyzer is a software application or set of infrastructure capable of unencrypted and recording communication that travels through a virtual system of a computer system.A packet analyzer used to detect network activity is recognized as a broadband monitoring system.

A packet analyzer is a code application that is used for monitoring, intercepting, and recording http requests with the help of a virtual interface.

Other options are incorrect because they are not related to the given scenario.

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2 years ago