What is cryptographic synchronisation?
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What are knapsack cryptosystems?
What is public key encryption?
What is cryptology?
How to find someone else?s public key ?
What is secret-key cryptography ?
What is the difference between a message authentication code (MAC) and a one-way hash?
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.
How does one get a key pair ?
what is trapdoor and how does it works?
What is the Popular Symmetric-Key Encryption Method
What is the difference between Kryptel and Silver Key?