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GREYUIT [131]
3 years ago
10

A coffee shop is considering accepting orders and payments through their phone app and have decided to use public key encryption

to encrypt their customers' credit card information. Is this a secure form of payment?A. No, public key encryption allows the credit card information to be read by the public.B. No, the internet protocols are open standards and thus everything sent over the internet is sent "in the clear".C. Yes, public key encryption is built upon computationally hard problems that even powerful computers cannot easily solve.D. Yes, public key encryption is secure because it transmits credit card information in binary.
Computers and Technology
1 answer:
Alina [70]3 years ago
8 0

Answer:

C. Yes, public key encryption is built upon computationally hard problems that even powerful computers cannot easily solve

Explanation:

Public Key encryption makes use of a public key and a private key to secure data sent over the internet, such as credit card information. The public key is shared publicly, as seen with an SSL/TLS certificate. The data encrypted by the public key can only be decrypted by the private key found on the website server. Data encrypted by the private key can only be decrypted by a specific public key. This makes public key encryption complex and hard to solve, making it very secure .

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Answer:

The solution code is as follows:

  1. #include <iostream>
  2. #include <fstream>
  3. #include <string>
  4. using namespace std;
  5. int main()
  6. {
  7.    ifstream data;
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  9.    float sum = 0;
  10.    
  11.    data.open("numbers.txt");
  12.    
  13.    while (data >> number) {
  14.        sum = sum + number;
  15.    }
  16.    cout<<sum;
  17.    return 0;
  18. }

Explanation:

Firstly, we create a ifstream object, <em>data</em> (Line 9). Then we can use the ifstream object to open the "numbers.txt" (Line 13) and use while loop to traverse through the number in the text file line by line (Line 15). White the loop is ongoing the number in each line is read by >> operator in a similar way to cin and then add each read number to sum variable (Line 16).

At last, display the output (Line 18).

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