Data interception and theft

Forms of attack: Data interception and theft

1.4.1 Threats to computer systems and networks

Threats to computer systems and networks — Note 6 of 7

What you need to know

Data interception and theft occurs when data being transmitted over a network is captured by unauthorised third parties. This often happens on unsecured networks using software that 'listens' for unencrypted data.

What to know

Often targets unencrypted data on unsecured networks (e.g. public Wi-Fi).
Stolen data can include login details, credit card numbers, personal information.
Can lead to identity theft, fraud, or unauthorised access to systems.

Key terms

Data Interception and Theft: Capturing data being transmitted over a network without permission, often using special eavesdropping software.

Exam technique

Tip:Encryption is the main defence — even if data is intercepted, encryption makes it UNREADABLE without the decryption key.
Mistake:Saying a firewall or penetration testing can stop data interception. If data is being transmitted between computers on the Internet, there is no firewall in between — only ENCRYPTION protects against interception.

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