Encryption

1.3.2 Wired and wireless networks, protocols and layers

Wired and wireless networks, protocols and layers — Note 2 of 13

What you need to know

Encryption converts data into a coded format so that only authorised users with the correct decryption key can read it. It is essential for protecting sensitive data during transmission, especially over wireless networks.

What to know

Encrypted data is unreadable to anyone who intercepts it without the key.
Used to protect sensitive information like passwords, payment details, and personal data during transmission.
Especially important for wireless networks where data signals can be more easily intercepted.

Key terms

Encryption: Converting data into a coded (unreadable) format that can only be decoded by someone with the correct decryption key.

Exam technique

Tip:Encryption does NOT prevent data from being intercepted — it makes intercepted data UNREADABLE/meaningless without the key.
Mistake:Saying 'encryption stops data being intercepted'. Data CAN still be intercepted — but when opened it will be MEANINGLESS without the decryption key.
Tip:When explaining encryption, say 'data cannot be UNDERSTOOD if intercepted' — not 'data cannot be READ'. It can be read, just not understood.

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