Security of Data

Processing of data considering security of data through the use of;

a password is used to protect data
data that is not important, may not even need a password
important data needs strong passwords
online accounts need a username and a password eg hotmail, gmail, bank accounts
keep passwords safe
keep track of your passwords for each time you start an online account. always email yourself 3 things. username, password, web address
a password is useless, if you forget it
don't use words in the dictionary for passwords
have a system for making your password,
- eg1 My House is in Smith St becomes Mhiiss
- eg2 more secure. From the sentence above you could have a password Mh!15s by using the first letter of each word, but adding the trick of using the characters above the numbers on the keyboard
- eg3 there are 5 people in my family and 2 dogs becomes t#%pImf&2D
- longer passwords with lower case, upper case, numbers, top row characters, right side characters are the best

Learn more here, here and here

a firewall is a barrier to prevent harmful programs getting to a computer
a simple firewall is software on the computer which is turned on to prevent access to the computer from the internet
a firewall can also be hardware which filters information from the internet, again to protect the computer. eg a proxy server in a computing network

in data security it is the use of parts of the human body to assist access control
fingerprint
facial recognition
(eye) iris recognition
hand geometry (the shape of hand/length of fingers)
voice recognition

large companies use anti-virus software (called malware) to prevent data loss eg Symantec, McAfee, Norton
this software detects intruder programs, based on a list of intruder programs on its server
each time a new intruder program (or virus) is found, it is added to the server
individuals also use anti-malware software to protect data
large companies also use data loss prevention software which encrypts files to protect them, eg it encrypts emails before they are sent.

used to make sure that a document hasn't been touched or altered while emailed or transferred
used by software companies to make sure their online software is not tampered with
it uses encryption via public and private keys (these are very long strings of letters which are added to the document)
if someone tries to alter a document with a digital signature, they can't re-create a valid digital signature
the reason for this is because the intruder cannot know the private key made at document creation
for it to be successful the public and private keys must be matched
learn more here

online shopping companies, schools, and others use digital certificates
these are kept on your computer and when you link to the location eg woolworths online, the digital certificate is matched to the online version. If it matches you can connect.
digital certificates use public keys and digital signatures
learn more from wikipedia

is the translation of a file or document into a secret code
the only way to read the file or document is to have the secret code.
putting it into the secret code is called encryption
reading it from the secret code is called decryption
if encrypted, it is called cypher text
if not encrypted, it is called plain text
encryption can be used when transfering a file, it can also be used when storing a file
it is becoming popular with more people worried about data security
you can use encryption software to protect your data, but it can slow down your work procedures quite a lot
just browse encryption software
learn more from lifehacker

What do all of the topics above have in common?
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What is the best way to protect data?
What do companies do to prevent tampering with files?
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