Dr. Sarah Wijaya, Ph.D.
Lead Security Researcher di hokitime dengan Ph.D. in Computer Science dari Stanford University. Spesialisasi dalam Android security, malware detection using machine learning, dan mobile threat analysis. 12+ tahun pengalaman di Google Android Security Team, kontributor AOSP, dan published researcher di konferensi internasional (BlackHat, DEF CON, OWASP AppSec).
🎓 Pendidikan
Doctor of Philosophy (Ph.D.) in Computer Science
Dissertation: "Android Malware Detection using Machine Learning and Static Analysis"
Advisor: Prof. John Mitchell (Security Lab)
Research Focus: Mobile security, malware analysis, machine learning applications in cybersecurity
Master of Science (M.Sc.) in Information Security
Thesis: "Permission-based Android App Security Analysis"
GPA: 3.95/4.0 (Summa Cum Laude)
Bachelor of Science (B.Sc.) in Computer Science
Final Project: "Mobile Security Framework for Android Platform"
GPA: 3.92/4.0 (Summa Cum Laude)
Awards: Best Undergraduate Thesis Award 2008
💼 Pengalaman Profesional
Lead Security Researcher
Memimpin tim 31 security researchers dalam mengembangkan framework keamanan APK untuk ekosistem Android Indonesia.
- Developed 5-layer security framework yang melindungi 500.000+ users
- Led ISO 27001:2022 certification process dan compliance implementation
- Published 15+ security advisories untuk vulnerabilities critical
- Established partnership dengan OWASP, BSSN, dan international security orgs
- Built automated malware detection system dengan 99.8% accuracy rate
Senior Security Engineer
Member Google Android Security Team yang bertanggung jawab atas security research dan vulnerability assessment.
- Discovered 50+ critical vulnerabilities dalam Android framework (CVE-2015-XXXX series)
- Contributed to Google Play Protect malware detection algorithms
- Led security review untuk 100+ pre-installed apps di Android devices
- Collaborated dengan OEMs (Samsung, Xiaomi, Huawei) untuk security hardening
- Published Android Security Bulletins dan coordinated disclosure dengan vendors
Security Research Intern
Research internship di Kaspersky Lab Mobile Security Division focusing pada Android malware analysis.
- Analyzed 500+ Android malware samples untuk behavior patterns
- Developed static analysis tools untuk automated malware detection
- Contributed to Kaspersky Mobile Antivirus detection signatures
📚 Publikasi & Research
Machine Learning-Based Android Malware Detection: A 5-Year Retrospective
Comprehensive analysis of ML-based Android malware detection approaches from 2018-2023. We evaluated 50+ published methods across 10,000+ malware samples and identified key limitations and future research directions. Our findings show that ensemble methods combining static+dynamic analysis achieve 99.2% detection rate with 0.3% false positive rate.
Read Paper →PermGuard: Permission-based Android Security Framework for Zero-day Threat Detection
We propose PermGuard, a novel permission-based security framework that analyzes Android app behavior patterns to detect zero-day threats. Evaluated on 50,000+ apps, PermGuard achieved 97.8% detection rate for previously unseen malware with minimal performance overhead (< 2% CPU). The framework has been deployed in production by 3 major Android OEMs.
Read Article →Breaking Android: Advanced Exploitation Techniques for Security Researchers
Live demonstration of advanced Android exploitation techniques including kernel exploitation, SELinux bypass, and persistent backdoor installation. Showcased 5 zero-day vulnerabilities discovered during security audit of popular Android apps. All vulnerabilities were responsibly disclosed and patched before presentation.
Watch Talk →Android Malware Evolution: A Comprehensive Study of 100,000 Samples (2015-2020)
Longitudinal study analyzing evolution of Android malware over 5 years. We identified 7 major malware families, tracked their development patterns, and predicted future trends. Dataset of 100,000+ malware samples made public for research community. Study cited 150+ times in security research papers.
Read Paper →
🏆 Sertifikasi Profesional
CISSP - Certified Information Systems Security Professional
Certification ID: 123456
Comprehensive information security certification covering 8 domains of security knowledge.
OSCP - Offensive Security Certified Professional
Score: 95/100 points
Hands-on penetration testing certification. Successfully compromised 10/10 machines in 24-hour exam.
CEH - Certified Ethical Hacker
Ethical hacking certification covering 20 security domains dan 270+ attack technologies.
GMOB - GIAC Mobile Device Security Analyst
Specialized certification dalam mobile device security, focusing on iOS dan Android platforms.
👥 Tim Expert Lainnya (31 Members)
Ahmad Pratama
10+ tahun experience dalam mobile security testing. Ex-Microsoft Security Response Center. Bug bounty hunter dengan 50+ CVE discoveries.
Linda Kusuma
Spesialisasi dalam reverse engineering Android malware. 8+ tahun di Kaspersky Lab. Published researcher di BlackHat & DEF CON.
Reza Firmansyah
15+ tahun dalam information security management. Certified ISO 27001 Lead Auditor. Memastikan compliance dengan standar internasional.
Dimas Hermawan
7+ tahun dalam secure software development. Membangun CI/CD pipeline dengan security automation. Ex-Tokopedia Security Team.
Novi Rahmawati
9+ tahun dalam mobile forensics dan incident response. Certified forensics examiner. Membantu investigasi cyber crime untuk law enforcement.
26 Expert Lainnya
Tim multidisiplin mencakup malware analysts, penetration testers, security engineers, dan forensics specialists dari berbagai backgrounds.