Protect you computer and your data


Data security overview

Data security is the means of ensuring thatbecoming more and more common. It is now
data is kept safe from corruption and thatpossible to store 40 GB of data on a device
access to it is suitably controlled. Thusthat will fit in an employees pocket, data
data security helps to ensure privacy. Itthat could contribute to the downfall of a
also  helps  in  protecting  personal  data.business.
In the UK, the Data Protection Act is used toData corruption refers to errors in computer
ensure that personal data is accessible todata that occur during transmission or
those whom it concerns, and provides redressretrieval, introducing unintended changes to
to individuals if there are inaccuracies.the original data. Computer storage and
This is particularly important to ensuretransmission systems use a number of measures
individuals are treated fairly, for exampleto provide data integrity, the lack of
for credit checking purposes. The Dataerrors.
Protection Act states that only individuals
and companies with legitimate and lawfulData corruption during transmission has a
reasons can process personal information andvariety of causes. Interruption of data
cannot  be  shared.transmission causes information loss.
Environmental conditions can interfere with
The International Standard ISO/IEC 17799data transmission, especially when dealing
covers data security under the topic ofwith wireless transmission methods. Heavy
information security, and one of its cardinalclouds can block satellite transmissions.
principle is that all stored information,Wireless networks are susceptible to
i.e. data, should be owned so that it isinterference from devices such as microwave
clear whose responsibility it is to protectovens.
and  control  access  to  that  data.
Data loss during storage has two broad
Data theft is a growing problem primarilycauses: hardware and software failure. Head
perpetrated by office workers with access tocrashes and general wear and tear of media
technology such as desktop computers andfall into the former category, while software
hand-held devices, since employees oftenfailure typically occurs due to bugs in the
spend a considerable amount of timecode.
developing contacts and confidential and
copyrighted information for the company theyWhen data corruption behaves as a Poisson
work for they often feel they have some rightprocess, where each bit of data has an
to the information and are inclined to copyindependently low probability of being
and/or delete part of it when they leave thechanged, data corruption can generally be
company, or misuse it while they are still indetected by the use of checksums, and can
employment.often be corrected by the use of error
correcting  codes.
While most organizations have implemented
firewalls and intrusion-detection systemsIf an uncorrectable data corruption is
very few take into account the threat fromdetected, procedures such as automatic
the average employee that copies proprietaryretransmission or restoration from backups
data for personal gain or use by anothercan be applied. RAID disk arrays, store and
company.[citation needed] A common scenarioevaluate parity bits for data across a set of
is where a sales person makes a copy of thehard disks and can reconstruct corrupted data
contact database for use in their next job.upon  of  the  failure  of  a  single  disk.
Typically this is a clear violation of their
terms  of  employment.If appropriate mechanisms are employed to
detect and remedy data corruption, data
The damage caused by data theft can beintegrity can be maintained. This is
considerable with today's ability to transmitparticularly important in banking, where an
very large files via e-mail, web pages, USBundetected error can drastically affect an
devices, DVD storage and other hand-heldaccount balance, and in the use of encrypted
devices. Removable media devices are gettingor compressed data, where a small error can
smaller with increased hard drive capacity,make an extensive dataset unusable.
and activities such as podslurping are



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