CSCI Final

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