What is are "proprietary" and "public" cryptographic
algorithms?
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Who needs a key pair ?
What are some other public key cryptosystems ?
Is there a limit on the file size or on the number of encrypted files?
Blowfish uses the longest key. Does this mean it is the strongest cipher?
What is Ciphertext?
What information can be obtained from encrypted file?
What is the rabin signature scheme?
why hash functions are not used for encryption but authentication ?
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.
Hello. In Snort, how a digital signature is actually created for the authentication purpose and thereby provides intrusion detection as well as prevention. How the software for IDS/IPS comes to know regarding the threat/vulnerability using digital signature ? Whether any specific language or programming is used or not.
What are knapsack cryptosystems?
What is the difference between hardware and software encryption?
Cryptography Algorithms 
