Online Social Networks (OSNs) are public social platforms offering users services such as connecting with remote individuals, sharing activities and experiences, and, most notably, sharing personal information. However, these platforms have their risks. OSNs have become a fundamental component in people's daily lives, not just as a platform to establish contacts but also as a means of soliciting contributions for personal data. This personal data, such as relationship status, phone numbers, address, current location, and sharing information regarding their everyday lives, opinions, political affiliations, etc., can be susceptible and should be shared cautiously. The information provided helps ingrain users in the network, driving traffic and creating treasure troves of information for hackers. This vulnerability makes OSNs a prime target for malicious users who harvest personal data to conduct attacks in the future. Users must be aware of these risks and take steps to protect their data.
OSNs have caused an exploitation of online human interaction and
connectivity. Each minute, 49,380 posts are created on Instagram, and 473,400
tweets are shared on Twitter. Moreover, Facebook is one of the largest and most
used OSNs, with 1.5 billion daily active users. This exchange information includes
Health Conditions, User status shared on their personal account's wall such as
an address, Public Individual's thoughts sharings regarding Social
Establishment, educational, Personal thoughts and opinions on various aspects
of social engagements, and off-course Workplace information. The user shared
this information with their inner trust circle.
Detection of Collaboration Malicious Users in Crowdsourcing: Crowdsourcing
marketplaces or Internet crowdsourcing systems, such as Amazon Mechanical Turk
(AMT), offer monetary rewards for completing specific tasks. As a result, they
have become valuable sources of feedback for new products and services.
Usually, these tasks are complex for computers to complete sentiment analysis
of text, classify website content, create a 3-D photo tour, etc. This reward
has begun to attract malicious users to present that behaviour; colluders are concerned
with avoiding the effort usually required to produce a genuine review rather
than with its quality.
The Sybil attack is a chilling example of how easy it is to exploit the
vulnerabilities in OSNs. In 2012, Facebook conducted an experiment to test its
network's vulnerability to fake accounts. They created numerous counterfeit
accounts that appeared to be independent users and used them to manipulate the
network's algorithms, spread misinformation, and influence public opinion. This
demonstrated how individuals or organizations can create multiple fake accounts
and use them to deceive others or gain an unfair advantage. The attackers used
several techniques to exploit these vulnerabilities effectively, highlighting
the potential dangers of Sybil attacks in social networks.
Mass Account Creation: The Sybil attackers created many fake accounts,
making it difficult for the platform to detect and prevent their activities.
This allowed them to have a significant presence on the network and amplify
their reach.
Faking Relationships and Amplifying Content: The attackers established
connections with legitimate users by sending friend requests, commenting on posts,
and conversing. By appearing as active and engaged users, they gained the trust
of others on the platform.
The attackers spread false information, rumours, and misleading content
through fake accounts. This misleading content could include phoney news
articles, doctored images, or deceptive advertisements. By using the network's
viral nature to amplify their messages, the attackers were able to influence
many users. This highlights the potential impact of misinformation and the need
for user vigilance when consuming content on social networks.
In summary, the Sybil attackers exploited the vulnerabilities in
Facebook's network and significantly impacted the platform's ecosystem. This
example highlights the potential dangers of Sybil attacks in social networks
and the importance of implementing robust security measures to prevent such
malicious activities.
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