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Evgen [1.6K]
2 years ago
11

In this problem, we want to compare the computational performance of symmetric and asymmetric algorithms. Assume a fast public-k

ey library such as OpenSSL [132] that can decrypt data at a rate of 100 Kbit/sec using the RSA algorithm on a modern PC. On the same machine, AES can decrypt at a rate of 17 Mbit/sec. Assume we want to decrypt a movie stored on a DVD. The movie requires 1 GByte of storage. How long does decryption take with either algorithm
Computers and Technology
1 answer:
MariettaO [177]2 years ago
4 0

Answer:

The AES decryption time is 8 minutes

Explanation:

GIVEN THAT:

The 1 GByte is equal to 230 bytes and equal to 233 bits

The RSA decryption time is calculated as = 233 / (100*230 )

= 83886. 06 seconds

= 23 hours

The RSA decryption time is 23 hours

The AES decryption time is calculated as = 233 / (17 * 230 )

= 481.81 seconds

= 8 minutes .

The AES decryption time is 8 minutes

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Write c++ program bmi.cpp that asks the user bmi.cpp the weight (in kilograms) and height (in meters).
Galina-37 [17]

Answer:

// here is code in C++(bmi.cpp).

#include <bits/stdc++.h>

using namespace std;

// main function

int main()

{

   // variables

float weight,height;

cout<<"enter the weight(in kilograms):";

//read the weight

cin>>weight;

cout<<"enter the height(in meters):";

//read the height

cin>>height;

// calculate the bmi

float bmi=weight/(pow(height,2));

// print the body-mass index with two decimal places

cout<<"BMI is: "<<fixed<<setprecision(2)<<bmi<<endl;

return 0;

}

Explanation:

Read the weight from user and assign it to variable "weight",read height and assign it to variable "height".Then find the body-mass index as (weight/height^2).Here weight  should be in kilograms and height should be in meters.

Output:

enter the weight(in kilograms):75

enter the height(in meters):1.8

BMI is: 23.15

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2 years ago
3.A customer has a system with a Gigabyte B450 Aorus Pro motherboard. He wants to upgrade the processor from the AMD Athlon X4 9
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Answer:

The upgrade is possible and it will yield a remarkable  increase in performance

Explanation:

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                                                    ∃x¬P(x)

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R(x) represents the tool, P(x) represents x is in correct place and Q(x) shows x is in excellent place. ∀ is used to show that "all" tools and ∧ is used here because tools are in correct place AND are in excellent condition so it depicts both P(x) and Q(x). This statement can be translated into logical expression as follows:

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c) Everything is in the correct place and in excellent condition.

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