Test Yourself - Security 1

Test yourself – Security 1 

 

What is the difference between IDS and IPS? 

An IDS (intrusion detection system) monitors behaviour to find threats. If it detects a potential threat, the IDS will not act upon it. When an IPS (intrusion prevention system) detects a threat, it will act upon it to try and eliminate it. 

 

What is the purpose of a NIDS? 

A NIDS (network intrusion detection system) monitors network traffic to find threats in the network. The purpose is to defend the network from internal and external threats. 

 

What is asymmetric encryption? 

Asymmetric encryption is when there is a different key to encrypt and decrypt data. The encryption key is public whilst the decryption key is private. 

 

How do websites show they are encrypted? 

HTTPS websites show a small padlock icon next to the URL in the address bar. 

 

What does hashing demonstrate? 

Hashing is where a string is encrypted by replacing the letters for each character. There are various algorithms to do this such as MD5, SHA-1, etc... 

 

Identify two uses of hashing. 

One use of hashing is to store passwords more securely. For example, when a password is hashed and stored in a database, if a hacker were to gain access to it, they wouldn't be able to read it as easily. Another use is to create unique fingerprints for files, so they are more secure and harder to break into by hackers. 

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