A company wants to transmit data over the telephone, but it is concerned that its phones may be tapped. All of its data is transmitted as four-digit integers. It has asked you to write a program that will encrypt its data so that the data may be transmitted 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 XHTML text that displays the encrypted integer.

3433

How can we use quantum properties in cryptography ?

1705

What is an algorithm?

2213

what is trapdoor and how does it works?

1952

What are the advantages of public-key cryptography compared with secret-key cryptography?

765

Blowfish uses the longest key. Does this mean it is the strongest cipher?

2215

How to I prevent other users from using Kryptel (Silver Key)?

1855

Actual role of cryptography is data security .Explain with real world example?

1748

How Encoding is different from Encryption?

854

What are knapsack cryptosystems?

831

What are the ecb and cbc modes?

873

What is public-key cryptography ?

1773

What information can be obtained from encrypted file?

1918

WHAT IS A SAMPLE USER INTERFACE OF DES ENCRYPTION/DECRYPTION PROJECT?

2313

What is the elgamal cryptosystem?

913