CSCI Final

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What is the main problem with simple substitution

It maintains letter and word frequency

Which of the following is an encyrption method using two or more different shifts

Multi-alphabet encryption

Which of the following most accurately defines encryption

Changing a message so it can only be easily read by the intended recipient

WHich of the following is a symmetric key system using 64-bit blocks?

DES

Why is binary mathematical encryption not secure?

It does not change letter or word frequency

Which of the following methods is available as an add-in for most email clients

PGP

What is PGP?

Pretty good privacy, a public key encryption method

Which of the following is the most true regarding binary operations and encyrption?

THey can form a part of viable encryption methods

Which binary mathematical operation can be used for a simple encryption method?

XOR

Which of the following is the oldest encryption method discussed in this text

Caesar cipher


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