What are the disadvantages of public-key cryptography compared with secret-key cryptography?
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what is pretty good privacy?
What is the difference between hardware and software encryption?
How can we use quantum properties in cryptography ?
Is there a limit on the file size or on the number of encrypted files?
Actual role of cryptography is data security .Explain with real world example?
What is public key encryption?
What key size should be used ?
How to find someone else?s public key ?
What happens when a key expires ?
How Encoding is different from Encryption?
What are "stream" and "block" ciphers?
What is key recovery ?