A company wants to transmit data over the telephone, but they are concerned that their phones may be tapped. All of their data is transmitted as four-digit integers. They have asked you to write a program that will encrypt their data so that it may be trans- mitted more securely. Your script should read a four-digit integer entered by the user in a prompt dialog and encrypt it as follows: Replace each digit by (the sum of that digit plus 7) modulus 10. Then swap the first digit with the third, and swap the second digit with the fourth. Then output HTML text that displays the encrypted integer. Write a separate program that inputs an encrypted four- digit integer and decrypts it to form the original number.
What will be an ideal response?
```
1
2
3
4
5
6
7
8
26
27
28
29
30
Click Refresh (or Reload) to run this script again.
31
32
```
Computer Science & Information Technology
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