Hi, my name is
Oyetunde Yunus
Coy Emerald
Founder of O-range Cyber Security Training & Services Ltd. I specialize in identifying vulnerabilities and strengthening digital defenses through ethical hacking and cybersecurity.
Hi, my name is
Founder of O-range Cyber Security Training & Services Ltd. I specialize in identifying vulnerabilities and strengthening digital defenses through ethical hacking and cybersecurity.
I'm Oyetunde Yunus, known professionally as Coy Emerald, the Founder of O-range Cyber Security Training & Services Ltd. With years of experience in cybersecurity, I've dedicated my career to helping organizations secure their digital assets.
My expertise lies in identifying vulnerabilities before malicious actors can exploit them. I take pride in my ethical approach to hacking, ensuring that my work always improves security rather than compromising it.
Beyond technical skills, I'm passionate about educating others in cybersecurity and ethicalhacking. I believe knowledge sharing is key to building a more secure digital future for everyone.
Comprehensive security assessments to identify vulnerabilities in your systems before attackers can exploit them. I simulate real-world attacks to test your defenses.
Detailed analysis of your systems to uncover security weaknesses. I provide actionable recommendations to strengthen your security posture.
Specialized testing for mobile applications to ensure they're protected against common vulnerabilities and security threats specific to mobile platforms.
Customized training programs for your team, covering ethical hacking, secure coding practices, and cybersecurity awareness.
Comprehensive ethical hacking training program that has helped hundreds of students learn web application penetration testing and launch successful careers in bug bounty hunting, along with guidance on setting up and managing bug bounty programs to leverage the global security researcher community for discovering and responsibly disclosing vulnerabilities.
Strategic advice on security architecture, policy development, and risk management to align security with your business objectives.
Recognized by Apple for identifying and reporting critical security vulnerabilities in their products, helping to improve security for millions of users worldwide.
Comprehensive ethicalhacking training program that has helped hundreds of students learn web application penetration testing and start successful careers in bug bounty hunting.
Partnered with the National Information Technology Development Agency (NITDA)—the official government body responsible for the development and regulation of Information Technology in Nigeria—to empower Nigerians with essential skills in cybersecurity and ethical hacking.
Worked with the Nigeria Police Force to identify and patch vulnerabilities in their "Rescue Me" mobile application, enhancing security for this critical public service tool.
"Dear Yunus Oyetunde, we appreciate your assistance in helping to maintain and improve the security of our products! Your ethical approach and technical expertise have been invaluable in identifying critical vulnerabilities."
"Dear Coy Emerald, your valuable contribution through your security reports has directly strengthened our security processes. We greatly appreciate your ethical approach and efforts in making our platform more secure for all users."
"We would like to appreciate your help for your contribution in patching the discovered vulnerabilities in the NPF Rescue Me App. Your work has enhanced the security of this important public safety application."
Have a security concern or want to discuss how I can help protect your digital assets? Feel free to reach out through any of the channels below or send me a message directly.