Cyber security looks at ways to prevent digital ____. This can include ways to be protected from ____, hackers and bugs. It all starts with a strong and secret ____. Anti-virus software is important to have installed on all your ____. ____ is used to send secret messages. We use a ____ to encrypt and ____ plaintext. There are hundred of different types and ciphers in millions of different ____ - so it is very difficult to decrypt data without knowing the key.

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