What is secret-key cryptography ?
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what are some of the current encryption schemes?
What is an algorithm?
How to change the encrypted file icon?
What is the life cycle of a key ?
What is private key cryptography and how we compare it with public key cryptography?
What are the cfb and ofb modes?
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.
Do digital signatures help detect altered documents and transmission errors?
What is cryptographic synchronisation?
What is the Popular Symmetric-Key Encryption Method
Blowfish uses the longest key. Does this mean it is the strongest cipher?
How should I store my private key ?
Cryptography Algorithms 
