Cryptography

What is a code?

• A different way of representing data

• A secret way to talk to someone

• Programming languages

• A set of rules

What is this an example of?

.. -.-. - .. ... - .... . -... . ... -

• Data Matrix

• Morse Code

• Telegraph Code

• Leet Speak

Codes often found on items in shops are called ___

Leet Speak looks like this:

C0MPU71N6 15 7H3 8357

• True

• False

Which of these best describes a check digit?

• A number that helps you find a book in a library.

• A number that helps you unlock your phone.

• A number that helps you validate a code, like an ISBN.

• A number that tells you how much a book costs

What data is not included in a barcode?

• Price

• Manufacturer

• Item ID

• Size/Weight

The emergency code in Morse Code is otherwise known as ___.

Hint: ... --- ...

Where are you most likely to find an ISBN?

• On a new t shirt

• On a packet of crisps

• On a restaurant menu to help you order online

• On the back of a book

Morse code was originally intended to be...

• Listened to

• Read off a piece of paper

• Seen by a flashing light

A barcode is read by a barcode scanner. What is this an example of?

• A laser device.

• A storage device.

• An output device.

• An input device.