What is secret-key cryptography ?
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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.
What are the advantages of public-key cryptography compared with secret-key cryptography?
Blowfish uses the longest key. Does this mean it is the strongest cipher?
What is key recovery ?
What happens if a private key is compromised ?
What is cryptographic synchronisation?
What is the difference between Kryptel and Silver Key?
What is probabilistic encryption?
What Is Encryption?
What is meant by 1024, 2048, 5096 bit encryption?
What is the life cycle of a key ?
What is the Popular Symmetric-Key Encryption Method