Data Representation: Encryption and Databases

Question 1

Name 3 modern methods of data encryption

Answer 1

• Asymmetric encryption
• Symmetric encryption
• Caesar Cipher

Question 2

what is asymmetric encryption?

Answer 2

this method encrypts and decrypts data using two different keys

Question 3

what is symmetric encryption?

Answer 3

this method encrypts and decrypts information using the same key

Question 4

Define Database

Answer 4

an organized store of data

Question 5

Define entity

Answer 5

something that is recognized in being capable of an independent existence. It is usually a physical object, but it can also be a concept

Question 6

Define attribute

Answer 6

an item of data stored about an entity

Question 7

What is a primary key?

Answer 7

a unique identifier for each record in a table; usually a field that is guaranteed to hold unique information for each record

Question 8

Define foreign key

Answer 8

a field in one table that uniquely identifies with another table

Question 9

What is a relational database?

Answer 9

a database that allows data elements in one table to be related to any piece of data in another table as long as both tables contain a common element