Exam 6: Encryption

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Which is a widely used public key system that is considered by many experts to be very secure and is available as a plug-in for Netscape Messenger,MSN Messenger,and other communication software?

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Which is true about public key encryption?

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Which is a symmetric key encryption system?

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Which is a very complicated block cipher using 128-bit keys to generate sub-keys to be applied to multiple blocks at the same time?

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Which is a very early encryption method?

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