Computer Science (0984) 2023 - 2 Data Transmission 2-3
- Created by: Twitsed
- Created on: 25-03-23 12:04
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2-3 Encryption
- Encryption is the process of encoding data or a message so that it cannot be understood by anyone other than its intended recipient.
- Encryption does not prevent someone from intercepting a message - instead it prevents them from being able to understand it.
- Unencrypted messages are referred to as plain text messages.
- Encrypted messages are known as ciphertext.
2-3-1 Understand the need for and purpose of encryption when transmitting data
- Encryption is used to ensure that data can be stored and messages can be sent securely over a network.
- Online purchases
- Encrypting documents that are private
- Satellite TV transmissions prevent non-subscribers from watching TV shows
2-3-2 Understand how data is encrypted using symmetric…
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