Computer Security - DDWC 3343 by Norhayati https://padlet.com/nhayati_kl/27vwb2ed2nw What is Computer Security en-us 2019-04-11 14:54:27 UTC 2026-02-02 20:14:25 UTC hello@padlet.com https://padletuploads.blob.core.windows.net/prod/80264060/cdf38ae2d21ee13c036196e76c1eb262/Backback.png Why do you need to learn computer Security? nhayati_kl https://padlet.com/nhayati_kl/27vwb2ed2nw/wish/350805688 Is there any specific reasons?]]> 2019-04-11 14:54:27 UTC https://padlet.com/nhayati_kl/27vwb2ed2nw/wish/350805688 What are the basic security terminologies? nhayati_kl https://padlet.com/nhayati_kl/27vwb2ed2nw/wish/350805691 •plaintext - the original message 
•ciphertext - the coded message 
•cipher - algorithm for transforming plaintext to ciphertext 
•key - info used in cipher known only to sender/receiver 
•encipher (encrypt) - converting plaintext to ciphertext 
•decipher (decrypt) - recovering ciphertext from plaintext
•cryptography - study of encryption principles/methods
•cryptanalysis (codebreaking) - the study of principles/ methods of deciphering ciphertext without knowing key
•cryptology - the field of both cryptography and cryptanalysis
]]> 2019-04-11 14:54:27 UTC https://padlet.com/nhayati_kl/27vwb2ed2nw/wish/350805691 Types of Security Threats nhayati_kl https://padlet.com/nhayati_kl/27vwb2ed2nw/wish/350805694 Do you know what is computer security?]]> 2019-04-11 14:54:27 UTC https://padlet.com/nhayati_kl/27vwb2ed2nw/wish/350805694 What is Computer Security? nhayati_kl https://padlet.com/nhayati_kl/27vwb2ed2nw/wish/350812570
To decide whether a computer system is “secure” , you must first decide what “secure” means and which threats are in concern.

 You first need to decide what is 
◦“computer system”
◦vulnerability
◦Threat
◦Attack
 To ensure that a computer system is “secure” you need to identify the protective measure or procedure that can be used
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