Security Flashcards

1
Q

Firewalls

A
  • Sits between users computer and internet
  • filters information
  • examines traffic
  • checking incoming and outgoing data
  • prevents viruses and hackers entering users computer
  • can block traffic
  • keeps list of undesirable IPs
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2
Q

Proxy Servers

A
  • Acts as intermediary between user and web server
  • allows traffic to be filtered
  • using cache they can speed up acces to information
  • keeps IP address secret
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3
Q

Types of encryption

A
  • Symmetric
  • Plain text and Cypher text
  • Authentication
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4
Q

Symmetric encryption

A
  • Secret key
  • One key is needed to encrypt and decrypt on both ends
  • increasing length of key increases strength of encryption
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5
Q

Plain text and Cypher text

A
  • Plain is before its encrypted, Cypher is output of an encryption rpogram
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6
Q

How can it be applied

A
  • Protect bank customers from fraud
  • bank uses 10/12 digit unique code
  • may be asked for 3 numbers in a random order of their 4 digit pin
  • uses a hand held device for cards
  • asks for key pats of the password to be inputed using inboxes
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