A system to filter unwanted messages from osn user walls

A System to Filter Unwanted Messages from OSN User
Walls
ABSTRACT:
One fundamental issue in today’s Online Social Networks (OSNs) is to give users
the ability to control the messages posted on their own private space to avoid that
unwanted content is displayed. Up to now, OSNs provide little support to this
requirement. To fill the gap, in this paper, we propose a system allowing OSN
users to have a direct control on the messages posted on their walls. This is
achieved through a flexible rule-based system, which allows users to customize the
filtering criteria to be applied to their walls, and a Machine Learning-based soft
classifier automatically labeling messages in support of content-based filtering.
EXISTING SYSTEM:
Indeed, today OSNs provide very little support to prevent unwanted messages on
user walls. For example, Facebook allows users to state who is allowed to insert
messages in their walls (i.e., friends, friends of friends, or defined groups of
friends). However, no content-based preferences are supported and therefore it is
not possible to prevent undesired messages, such as political or vulgar ones, no
matter of the user who posts them.

DISADVANTAGES OF EXISTING SYSTEM:
However, no content-based preferences are supported and therefore it is not
possible to prevent undesired messages, such as political or vulgar ones, no
matter of the user who posts them.
Providing this service is not only a matter of using previously defined web
content mining techniques for a different application, rather it requires to design
ad hoc classification strategies.
This is because wall messages are constituted by short text for which traditional
classification methods have serious limitations since short texts do not provide
sufficient word occurrences.
PROPOSED SYSTEM:
The aim of the present work is therefore to propose and experimentally evaluate an
automated system, called Filtered Wall (FW), able to filter unwanted messages
from OSN user walls. We exploit Machine Learning (ML) text categorization
techniques to automatically assign with each short text message a set of categories
based on its content.
The major efforts in building a robust short text classifier (STC) are concentrated
in the extraction and selection of a set of characterizing and discriminant features.
The solutions investigated in this paper are an extension of those adopted in a
previous work by us from which we inheritthe learning model and the elicitation

procedure for generating preclassified data. The original set of features, derived
from endogenous properties of short texts, is enlarged here including exogenous
knowledge related to the context from which the messages originate. As far as the
learning model is concerned, we confirm in the current paper the use of neural
learning which is today recognized as one of the most efficient solutions in text
classification. In particular, we base the overall short text classification strategy on
Radial Basis Function Networks (RBFN) for their proven capabilities in acting as
soft classifiers, in managing noisy data and intrinsically vague classes. Moreover,
the speed in performing the learning phase creates the premise for an adequate use
in OSN domains, as well as facilitates the experimental evaluation tasks. We insert
the neural model within a hierarchical two level classification strategy. In the first
level, the RBFN categorizes short messages as Neutral and Nonneutral; in the
second stage, Nonneutral messages are classified producing gradual estimates of
appropriateness to each of the considered category. Besides classification facilities,
the system provides a powerful rule layer exploiting a flexible language to specify
Filtering Rules (FRs), by which users can state what contents, should not be
displayed on their walls. FRs can support a variety of different filtering criteria that
can be combined and customized according to the user needs. More precisely, FRs
exploit user profiles, user relationships as well as the output of the ML
categorization process to state the filtering criteria to be enforced. In addition, the
system provides the support for user-defined Blacklists (BLs), that is, lists of users
that are temporarily prevented to post any kind of messages on a user wall.

ADVANTAGES OF PROPOSED SYSTEM:
A system to automatically filter unwanted messages from OSN user walls on
the basis of both message content and the message creator relationships and
characteristics.
The current paper substantially extends for what concerns both the rule layer
and the classification module.
Major differences include, a different semantics for filtering rules to better fit
the considered domain, an online setup assistant (OSA) to help users in FR
specification, the extension of the set of features considered in the classification
process, a more deep performance evaluation study and an update of the
prototype implementation to reflect the changes made to the classification
techniques.

SYSTEM CONFIGURATION:-
HARDWARE CONFIGURATION:-
 Processor - Pentium –IV
 Speed - 1.1 Ghz
 RAM - 256 MB(min)
 Hard Disk - 20 GB
 Key Board - Standard Windows Keyboard
 Mouse - Two or Three Button Mouse
 Monitor - SVGA
SOFTWARE CONFIGURATION:-
 Operating System : Windows XP
 Programming Language : JAVA
 Java Version : JDK 1.6 & above.
 DATABASE : MYSQL
 Tool : Netbeans IDE 7.0

REFERENCE:
Marco Vanetti, Elisabetta Binaghi, Elena Ferrari, Barbara Carminati, and Moreno
Carullo “A System to Filter Unwanted Messages from OSN User Walls”- IEEE
TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING, VOL.
25, NO. 2, FEBRUARY 2013.
FUTURE WORK / OUR CONTRIBUTION:
As the future work and our contribution we enhance the system by creating a
instance randomly notifying a message system that should instead be blocked, or
detecting modifications to profile attributes that have been made for the only
purpose of defeating the filtering system. Automatically user will get a mail
notification.

A system to filter unwanted messages from osn user walls

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