Unit 3 – Information Safety and Security


Question 2:

When researching types of codes from modern-day, I came across a code type that is called ‘Morse code.’ Morse code represents the letters of the alphabet using dots and dashes. Every letter has a unique sequence of dots and dashes. Dots are created using a short pulse and dashes with a longer one. Morse code can be shown as symbols, sound or light. Dots and dashes are used in combination to simplify the representation for each letter enabling each letter to be represented with a maximum of 4 symbols (Digital Technologies Hub, 2020).

This type of coding aligns with four different content descriptors from the Australian Curriculum;

  • Representation of data (ACTDIK008)
  • Investigating and defining (ACTDIP010)
  • Producing and implementing (ACTDIP011)
  • Evaluating (ACTDIP012) (Digital Technologies Hub, 2020).

Another code type I came across was QR codes. A QR code is another way to represent data. QR stands for Quick Response. It is a scannable barcode-like image that directs you to a particular digital location set up by the code-creator. To read the code you need an app that reads QR codes and the camera on a smartphone or tablet device. The barcode image is made up of pixels. Each pixel is made up of its own colour. In the case of QR code it is either black or white (Digital Technologies Hub, 2020).

This type of coding aligns with one content descriptor from the Australian Curriculum;

  • Representation of data (ACTDIK008) (Digital Technologies Hub, 2020).

These two types of coding can support a lesson about encoding and decoding messages, enabling students to visualise ways in which they can communicate safely and securely with their peers.

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