How is an s-box value of AES can be modified? How is it done?

876

what is trapdoor and how does it works?

994

What is an algorithm?

1157

What is the difference between a message authentication code (MAC) and a one-way hash?

2747

What is are "proprietary" and "public" cryptographic algorithms?

1048

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

1068

what is pretty good privacy?

940

What is secret-key cryptography ?

2998

What is public-key cryptography ?

899

How can we use quantum properties in cryptography ?

828

What is public key encryption?

948

How to change the encrypted file icon?

1350

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

1335

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.

2361

What are "stream" and "block" ciphers?

931