Authorship attribution on micro-messages
Thiago Cavalcante · 2014
With the ever-growing use of social media, authorship attribution plays an important role in avoiding cybercrime, and helping the analysis of online trails left behind by cyber pranks, stalkers, bullies, identity thieves and alike.In this dissertation, we propose a method for authorship attribution in micro blogs with efficiency one hundred to a thousand times faster than state-of-the-art counterparts.The method relies on a powerful and scalable feature representation approach taking advantage of user patterns on micro-blog messages, and also on a custom-tailored pattern classifier adapted to deal with big data and high-dimensional data.Finally, we discuss searchspace reduction when analysing hundreds of online suspects and millions of online micro messages, which makes this approach invaluable for digital forensics and law enforcement.xi xii First of all, I would like to thank God, who created a universe in such a way that we are able to find fixed patterns, some of these which are objects of my studies.I also thank my mother, father, sister and my fianceé who always supported, encouraged and helped me to pursue my dreams.My gratitude also goes to my advisors Ariadne and Anderson, who were with me through this important step in my life, not only with scientific but also with personal advices that made the going ever easier.Also, to all my teachers whom guided me through knowledge, moral and wisdom from the begining of my life until now.Last, but not least, to all of my family and friends who were with me for the jorney sometimes with helpful advices and sometimes providing entertainment and laughter.And also, I am grateful to all those who made this work possible from the founders of our educational institutions, through our governors and administrators to the janitors and security personnel -which not only do their jobs, but are also a pleasant company for an evening conversation.Thank you all, for making this possible.xvii xviii "A man does not call a line crooked unless he has some idea of a straight line.What was I comparing this universe with when I called it unjust?"C. S.