Youssef Rebahi-Gilbert started hacking at the age of five on a Commodore 64 way back in 1984. He is a sought-after expert for code audits of web applications and has a lot of experience in many aspects of information security and extensive experience in Computer Science in general. Besides Ruby and Metasploit, he likes the nature of SQL injections, assembly, and hardware hacking too.

Whenever there's time, he creates evolutionary programs to find new ways to paint pictures of his beautiful girlfriend: his love and the mother of their little girl. To circumvent becoming a nerd, he took acting and comedy classes, which made him the professional actor and instructor that he is today. His technical knowledge, combined with his acting skills, makes him the perfect social engineer—his new field of research.

In May 2014, he'll start working as a penetration tester at a European CERT. He's very open to new contacts; feel free to mail him via <[email protected]> or visit his site http://kintai.de for security-related material.

Kubilay Onur Gungor has been working in the IT security field for more than seven years. He started his professional security career with cryptanalysis of encrypted images using chaotic logistic maps. He gained experience in the network security field by working in the Data Processing Center of Isik University where he founded the Information Security and Research Society. After working as a QA tester in Netsparker Project, he continued his career in the penetration testing field with one of the leading security companies in Turkey. He performed many penetration tests and consultancies for the IT infrastructure of several large clients, such as banks, government institutions, and telecommunication companies.

Currently, he is working in the Incident Management Team with one of the leading multinational electronic companies to develop incident prevention, detection and response, and the overall cyber security strategy.

He has also been developing a multidisciplinary cyber security approach, including criminology, information security, perception management, social psychology, international relations, and terrorism.

He has participated in many conferences as a frequent speaker. Besides Computer Engineering, he is continuing his academic career in the field of Sociology (BA).

Besides security certificates, he holds the Foreign Policy, Marketing and Brand Management, and Surviving Extreme Conditions certificates. He also took certified training in the field of international relations and terrorism/counter-terrorism.

Sagar A Rahalkar is a seasoned information security professional with more than seven years of comprehensive experience in various verticals of IS. His domain of expertise is mainly in cyber crime investigations, digital forensics, application security, vulnerability assessment and penetration testing, compliance for mandates and regulations, IT GRC, and so on. He holds a master's degree in Computer Science and several industry-recognized certifications such as Certified Cyber Crime Investigator, Certified Ethical Hacker (C|EH), Certified Security Analyst (ECSA), ISO 27001 Lead Auditor, IBM-certified Specialist-Rational AppScan, Certified Information Security Manager (CISM), PRINCE2, and so on. He has been closely associated with Indian law enforcement agencies for over three years, dealing with digital crime investigations and related training, and has received several awards and appreciations from senior officials from the police and defense organizations in India.

He has also been one of the reviewers for Metasploit Penetration Testing Cookbook, Second Edition, Packt Publishing. Apart from this, he is also associated with several other online information security publications, both as an author as well as a reviewer. He can be reached at <[email protected]>.

Krishan P Singh is a Software Development Engineer in LSI India Research and Development. He did his master's in Computer Science and Engineering from the Indian Institute of Technology, Bombay. He is very hard working and enthusiastic.

Dr. Maninder Singh received his bachelor's degree from Pune University in 1994, holds a master's degree with honors in Software Engineering from Thapar Institute of Engineering and Technology, and has a doctoral degree with a specialization in Network Security from Thapar University. He is currently working as an associate professor at the Computer Science and Engineering Department in Thapar University.

He joined Thapar Institute of Engineering and Technology in January 1996 as a lecturer. His stronghold is the practical know-how of computer networks and security. He is on the Roll of Honor at EC-Council USA and is a certified Ethical Hacker (C|EH), Security Analyst (ECSA), and Licensed Penetration Tester (LPT). He has successfully completed many consultancy projects (network auditing and penetration testing) for renowned national banks and corporates. He has many research publications in reputed journals and conferences. His research interest includes network security and grid computing, and he is a strong torchbearer for the open source community.

He is currently supervising five PhD candidates in the areas of network security and grid computing. More than 40 master's theses have been completed under his supervision so far.

With practical orientation and an inclination toward research, he architected Thapar University's network presence, which was successfully implemented in a heterogeneous environment of wired as well as wireless connectivity.

Being a captive orator, he has delivered a long list of expert lectures at renowned institutes and corporates. In 2003, his vision of developing a network security toolkit based on open source was published by a leading national newspaper. The Linux For You magazine from India declared him a Tux Hero in 2004. He is an active member of IEEE and Senior Member of ACM and Computer Society of India. He has been volunteering his services for the network security community as a reviewer and project judge for IEEE design contests.