Protecting digital systems 1 (Edexcel GCSE Computer Science): Flashcards
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Practise the cards
15 cards from this deck
Defence-in-depth strategy
Defence-in-depth strategy
Multiple security layers - if one fails, others provide backup protection
Firewall's primary role
Firewall's primary role
First line of defence, filters network traffic
Traffic monitored by firewalls
Traffic monitored by firewalls
Both incoming and outgoing network traffic
Signature-based detection method
Signature-based detection method
Scans files against database of known malware signatures
Need for regular malware signature updates
Need for regular malware signature updates
New malware is constantly being created
Heuristic analysis purpose
Heuristic analysis purpose
Detect unknown threats by suspicious behaviour
Static heuristic analysis method
Static heuristic analysis method
Compares file code with known malware patterns
Dynamic heuristic analysis environment
Dynamic heuristic analysis environment
Sandbox (virtual environment) to observe file behaviour
Encryption's effect on data
Encryption's effect on data
Transforms it into unreadable scrambled format
Symmetric encryption key usage
Symmetric encryption key usage
Single key for both encrypting and decrypting
Symmetric encryption weakness
Symmetric encryption weakness
Shared key can be intercepted during transmission
Asymmetric encryption keys
Asymmetric encryption keys
Uses separate public key and private key
Public key function
Public key function
Used to encrypt data
Asymmetric encryption security advantage
Asymmetric encryption security advantage
Private decryption key never needs sharing
Benefit of multiple security layers
Benefit of multiple security layers
If one fails, others still protect the system