What
does iShield do?
Image Blocking - iShield can block any porn image displayed
in Internet Explorer with a customised replacement image.
URL Logging - iShield records
the URLs of any web-pages browsed that it has determined to
be pornographic. The iShield administrator can view a log of
such these pages.
Popup Warning - iShield can trigger
a warning message when it detects a web page which contains
pornographic material, so as to let the end-user know that the
incident has been captured.
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How is iShield
different from URL Filtering Software?
URL filters only restrict access to known pornographic web sites
and so are dependent on the list of known web-sites being up
to date. This dependency is important since there are in the
region of 100,000 new pornographic web-pages being placed on
the Internet each day. iShield does not use any lists of known
pornographic websites, instead it analyses each web-page as
it is loaded finds pornographic images and then blocks them.
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What's
so special about iShield?
It's the ONLY software capable or monitoring what's going on
within the browser.
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How
does iShield detect explicit images?
iShield's locates areas of interest in each image using colour-analysis.
Next a series of techniques are applied, namely contrast normalisation,
skin-colour analysis, texture-analysis, edge-detection, blob-detection,
shape analysis, brightness-flow analysis and face detection.
The results of these image processing techniques are fed into
a neural network to make a decision on the image. Next the text
is recovered from the web-page and analysed. The results of
the text-analysis and image-analysis are combined to make an
overall decision.
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What
does iShield do when it detects explicit images?
When iShield detects suspect material being displayed on a browser
it automatically records the event in a log file that can be
reviewed by the administrator. Next, if the image blocking mode
is switched on, then iShield replaces pornographic images with
a non-pornographic one.
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Can
I customize iShield's protection level?
iShield has a control panel accessible via a password. This
control panel allows the administrator to i) turn iShield's
detection engine on and off; ii) select the degree of pornography
about which an image will be blocked; iii) select which of the
three modes of operation, namely: Active Block, Active Warn
and Passive Mode is active; iv) view the report log containing
the URLs of pornographic web-pages visited by the end-user;
and v) change the administrator password. Note that in the first
mode of operation, the Active Block mode, images are replaced
with a non-pornographic image. In the second mode, Active Warn
mode, a message box pops-up when pornography is detected to
warn the user that they are being monitored. In the third mode,
the Passive Mode, the incidences of pornography are recorded
but no action is taken to warn the end-user or block any images.
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Will
iShield block images that are not pornographic?
Whilst iShield's detection engine is designed to reduce the
risk of false triggers, occasionally iShield will block non-explicit
images in part due to the inherent subjectivity of what constitutes
pornography. To alleviate this problem the pornographic level
above which images are block can be manually adjusted from iShield's
control panel.
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We've
already got a firewall …
Firewalls are perfect for stopping external access to your systems
but don't and can't control, monitor and report what is being
viewed using the web-browser.
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Do
I have to take out my existing blocking software?
No, we don't encourage this. Your existing software provides
a basic level of protection. Our software adds a much higher
degree of monitoring and control - within the web-browser itself.
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What
overheads are there on the PC?
None noticeable in operation.
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