Binary Security was founded in January 2019. Our goal is to offer high-quality cybersecurity services. Through an analytical approach to security engineering and security testing, we utilize our experience to solve difficult security problems inherent in today's technologies and uncover bugs that others do not find.
Christian August Holm Hansen is a security specialist and co-founder of Binary Security.
He holds an M.Sc. in Communication Technology from NTNU, with an exchange programme at EURECOM, with a
specialization in information security.
He has many years of experience as a security consultant,
having performed hundreds of technical security assessments with a mix of mobile applications, web
applications, IoT devices and networks.
Christian is an Offensive Security Certified Professional and excels at finding bugs and breaking into
networks. When time allows, he enjoys finding bugs in much used software and has been acknowledged by
Microsoft and Google for finding
vulnerabilities in Microsoft Azure and Google Cloud Platform. He has previously been among the top five
yearly "bughunters" in the Google VRP.
In 2019 he co-founded Binary Security after leaving the penetration testing team of a major scandinavian
financial institution.
Christian Håland is a security specialist and the other co-founder of Binary Security.
He holds an M.Sc. in Computer Science from NTNU with a specialization in security.
He spent a year at UC Santa Barbara taking courses in Information Security taught by Giovanni Vigna and
Richard Kemmerer at the UCSB Seclab.
He has many years of experience as a security consultant and in-house application security engineer at
Unity Technologies.
Christian is an Offensive Security Certified Professional and enjoys finding cool bugs, building
security tools, and researching topics within application security.
Torjus Bryne Retterstøl is a security specialist and partner of Binary Security.
He joined Binary Security in 2021 and has previously worked with technical information security since
2015. He has experience from companies in both
the public and private sectors, doing penetration testing, research and development, and security
consulting.
He holds an M.Sc. in Communication Technology from NTNU, with an exchange programme at EURECOM, with a
specialization in information security.
Torjus has the certifications Offensive Security Certified Professional (OSCP), Offensive Security
Certified Web Expert (OSWE), and Certified Information Systems Security Professional (CISSP).
Haakon Holm Gulbrandsrud is a security specialist and employee of Binary Security.
He joined Binary Security in 2022 after 5 years of experience with information security at the Norwegian
Defence
Research Establishment. From this, he has done extensive research in security testing and analysis.
With an M.Sc. in Mathematics from NTNU, he has learned to understand systems and complex logical
architectures in a deep way quickly.
Haakon enjoys the occasional deep-dive into x86 Assembly and is proficient with IDA Pro.
He is Binary Security's alias when it comes to reversing and binary exploitation.
Sofia Lindqvist is a security specialist and employee of Binary Security.
She joined Binary Security in 2023 and has previous experience as a developer on a widely deployed
Internetwork Operating System and doing penetration testing.
She holds a M.Sc. in Mathematics from NTNU as well as a PhD in Mathematics from Oxford University.
Sofia has the certifications Practical Network Penetration Tester (PNPT), Offensive Security Certified
Web Expert (OSWE), and Burp Suite Certified Practitioner (BSCP).
She enjoys researching and finding bugs in widely used software and holds four CVEs. She is an active
speaker at security conferences.