SUBJECTS: Technologies
YEARS: 9–10
Lots of private data is exchanged over the internet. What are some examples?
As Mia Epner explains, cryptography allows for the secure transfer of data online. How does encryption work? And what is a key?
Today information is encrypted using 256 bit keys. This keeps information safe because it means there are way too many possible key combinations for hackers' computers to try.
Mia describes two types of keys: public keys and private keys. Using the mailbox example in the video, explain to a friend or family member how public and private keys work. What does the 'https' in a web address signal?
Acknowledgements
Video © Code.org
Production Date: 21 Aug 2015
Copyright
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