Encryption Has a Remarkably Long and Varied History

question 30

Multiple Choice

Encryption has a remarkably long and varied history.Spies have been using it to convey secret messages ever since there were secret messages to convey.One powerful method of encryption uses random digits.Two documents are prepared with the same random sequence of numbers.The spy is sent out with one and the spy master retains the other.The digits are used as follows.Suppose that the word to be encrypted is SPY and the random digits are 352.Then S becomes V (three letters after S) ,P becomes U (five letters after P) ,and Y becomes A (two letters after Y,restarting at A after Z) .The spy would encrypt a message and then destroy the document used to encrypt it.This is an early example of

• A)a hashing algorithm.
• B)asymmetric key encryption.
• C)symmetric key encryption.
• D)public key encryption.

---

Definitions:

Profit Center

A division or segment of a company that is responsible for generating its own revenue and profit.

Residual Income

The income that remains after all personal debts and expenses have been paid, or in business, after all capital costs are deducted from net revenues.

Internal Centralized Service Department

A department within an organization that provides essential services or support centrally to other departments, often aiming to increase efficiency and standardization.

Manufacturing Department

A specialized division within a company that is focused on the production of goods.