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What is merkles tree signature scheme?
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Do digital signatures help detect altered documents and transmission errors?
What is public key encryption?
What is an algorithm?
What is are "proprietary" and "public" cryptographic algorithms?
What is an encryption "key" and what is the importance of key length?
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.
What are some other public key cryptosystems ?
How do certifying authorities store their private keys ?
What is the function of random numbers in encryption and how are they generated?
What Is Encryption?
What are the counter and pcbc modes?
What are the cfb and ofb modes?
Cryptography Algorithms 
