What is the elgamal cryptosystem?

983

What is multiple encryption?

909

What are the ecb and cbc modes?

937

How do certifying authorities store their private keys ?

2457

What is private key cryptography and how we compare it with public key cryptography?

1775

What are the counter and pcbc modes?

920

What is the Popular Symmetric-Key Encryption Method

896

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

2397

What is secret-key cryptography ?

4017

What are knapsack cryptosystems?

887

Is there a limit on the file size or on the number of encrypted files?

1924

How can we use quantum properties in cryptography ?

1783

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

1824

What is the mceliece cryptosystem?

914

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.

3476