Protect you computer and your data


Data security overview

Data security is the means of ensuringother hand-held devices. Removable media
that data is kept safe from corruptiondevices are getting smaller with
and that access to it is suitablyincreased hard drive capacity, and
controlled. Thus data security helps toactivities such as podslurping are
ensure privacy. It also helps inbecoming more and more common. It is now
protecting personal data.possible to store 40 GB of data on a
In the UK, the Data Protection Act isdevice that will fit in an employees
used to ensure that personal data ispocket, data that could contribute to
accessible to those whom it concerns,the downfall of a business.
and provides redress to individuals ifData corruption refers to errors in
there are inaccuracies. This iscomputer data that occur during
particularly important to ensuretransmission or retrieval, introducing
individuals are treated fairly, forunintended changes to the original data.
example for credit checking purposes.Computer storage and transmission
The Data Protection Act states that onlysystems use a number of measures to
individuals and companies withprovide data integrity, the lack of
legitimate and lawful reasons canerrors.
process personal information and cannotData corruption during transmission has
be shared.a variety of causes. Interruption of
The International Standard ISO/IEC 17799data transmission causes information
covers data security under the topic ofloss. Environmental conditions can
information security, and one of itsinterfere with data transmission,
cardinal principle is that all storedespecially when dealing with wireless
information, i.e. data, should be ownedtransmission methods. Heavy clouds can
so that it is clear whose responsibilityblock satellite transmissions. Wireless
it is to protect and control access tonetworks are susceptible to interference
that data.from devices such as microwave ovens.
Data theft is a growing problemData loss during storage has two broad
primarily perpetrated by office workerscauses: hardware and software failure.
with access to technology such asHead crashes and general wear and tear
desktop computers and hand-held devices,of media fall into the former category,
since employees often spend awhile software failure typically occurs
considerable amount of time developingdue to bugs in the code.
contacts and confidential andWhen data corruption behaves as a
copyrighted information for the companyPoisson process, where each bit of data
they work for they often feel they havehas an independently low probability of
some right to the information and arebeing changed, data corruption can
inclined to copy and/or delete part ofgenerally be detected by the use of
it when they leave the company, orchecksums, and can often be corrected by
misuse it while they are still inthe use of error correcting codes.
employment.If an uncorrectable data corruption is
While most organizations havedetected, procedures such as automatic
implemented firewalls andretransmission or restoration from
intrusion-detection systems very fewbackups can be applied. RAID disk
take into account the threat from thearrays, store and evaluate parity bits
average employee that copies proprietaryfor data across a set of hard disks and
data for personal gain or use by anothercan reconstruct corrupted data upon of
company.[citation needed] A commonthe failure of a single disk.
scenario is where a sales person makes aIf appropriate mechanisms are employed
copy of the contact database for use into detect and remedy data corruption,
their next job. Typically this is adata integrity can be maintained. This
clear violation of their terms ofis particularly important in banking,
employment.where an undetected error can
The damage caused by data theft can bedrastically affect an account balance,
considerable with today's ability toand in the use of encrypted or
transmit very large files via e-mail,compressed data, where a small error can
web pages, USB devices, DVD storage andmake an extensive dataset unusable.



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