使用 Google 試算表發送秘密訊息

The learner will use the Google Sheets spreadsheet to turn plain-text messages into encoded secret messages. Then they will embed those messages into an image. The image will contain the secret, encoded message which the learner can help friends discover and decode.

I will explain the introductory computer computer science and math concepts and provide a sample spreadsheet and image to turn a simple phrase into a secret message and hide it within an image. Through demonstration and hands-on exercises the learner will gain these abilities in cryptography and steganography. 

There are several classes that provide the opportunity to learn increasingly sophisticated algorithms and the learner will gain experience thinking through real-world computer science problems while producing amazing results. There will be some discussion about the history of using these techniques during the Roman era, WW II, and current internet encryption.

The learner should have access to Google Sheets, which is free to use and just requires a free Google account (no obligations, credit cards or payments). We will use increasingly interesting spreadsheet techniques to produce our messages. The learner should understand simple math formulas as well as being a reasonably experienced computer user.  Every step we take will have an example and  explanation as well as the opportunity to ask questions.

The class will be hands-on and fun and is structured to make the learners successful.