1. Level 2 Diploma Unit 11 IT Security
Data security
Level 2 Diploma
Unit 11 IT Security

2. Physical protection Limiting visibility of monitors Not overlooked
Restricted vision screens
Blackout Privacy Filter prevents unauthorized viewing
Micro-louvre technology creates a narrow viewing angle
Image is only visible to those directly in front of the screen
Side view is black

3. Encryption
“Scrambles” data on the disk so that it cannot be read without knowing the key
Can be set in folder properties
Uses the account details as a key
Need to export keys and save elsewhere
In case account is deleted or invalid
In case you want to use different computers

4. Encryption This is one of the simplest forms of encryption:
Aycqyp sqcb rfgq ambc.
This is more sophisticated and demands that you have a key to decrypt it:
Dygh vcnv rdhy 200 nxobj hd ufori
Of course you can make it even harder:
Dyg hvc nvr dhy 200 nxo bjh duf ori a b c d e f g h i j k l m n o p q r s t u v w x y z
Plain text
Code

5. Encryption Even if you have this table you still can’t decode without
the key!

6. When would you encrypt? to protect information from unauthorised view
credit card numbers
bank account information
personal health, income, tax, benefits information
personal correspondence
commercially sensitive information

7. Recovering encrypted data
In Windows you must create a recovery certificate for encrypted files
A recovery certificate is a special Encrypting File System (EFS) certificate
Requires administrator permissions
Enables you to recover encrypted files if your encryption key is lost or damaged

8. Folder properties

9. Software protection Anti virus Spyware protection In teams of 2
research 5 examples of software that protects against virus and spyware
Compare their features and cost
Arrange them in order of your choice of the most effective
Present your results

10. Password protection of files
Available on Office files

11. Digital signatures
A digital signature validates the authenticity of a digital message or document.
Checks the message
was created by a known sender,
it was not altered in transit.
Mainly used for software distribution and financial transactions,