What is a message digest?2 2566
How do CAs sign certificates?
What is Compressed archives?
What are strong primes and are they necessary for RSA ?
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 improvements are likely in factoring capability ?
What is secret splitting?
What is Steganography?
Blowfish uses the longest key. Does this mean it is the strongest cipher?
What are the most important attacks on stream ciphers ?
What is key management ?
Why do you keep the name of the used cipher in the open?
What is RC2 ?
What are some other DES variants ?
What is PSS/PSS-R ?
What are Message Authentication Codes (MACs) ?