1.1 Reliability and Integrity


Reliability
Reliability refers to the operation of hardware, the design of software, the accuracy of data or the
correspondence of data with the real world. Data may be unreliable if it has been entered incorrectly or if it
becomes outdated. The reliability of machines, software and data determines our confidence in their value.
An example of reliability can be seen here: http://news.cnet.com/8301-31021_3-20015470-260.html?tag=mncol

Broken_PC.jpg
Integrity
Integrity refers to safeguarding the accuracy and completeness of stored data. Data lacks integrity when it
has been changed accidentally or tampered with. Examples of data losing integrity are where information is
duplicated in a relational database and only one copy is updated or where data entries have been maliciously
altered.