HSL Helsinki Region Transport, Finland's public transport authority, has significantly enhanced its cybersecurity posture and development workflows by implementing GitHub Advanced Security for Azure DevOps. This strategic move addresses growing concerns about software supply chain attacks while improving compliance with strict regulations like PCI DSS.

The Cybersecurity Challenge for Public Transport

Public transport systems worldwide face increasing digital threats, from ransomware attacks targeting ticketing systems to vulnerabilities in real-time passenger information displays. HSL manages Helsinki's buses, trams, metro, commuter trains, and ferry services - all relying on complex software systems that require:

  • Secure handling of payment data (PCI DSS compliance)
  • Protection of passenger information
  • Reliable service delivery infrastructure
  • Integration with third-party applications

"Modern public transport isn't just about vehicles - it's a digital ecosystem," notes cybersecurity expert Dr. Emilia Koskinen from Aalto University. "Each touchpoint, from mobile apps to ticket validators, represents a potential attack surface that needs protection."

Implementing GitHub Advanced Security: A Strategic Move

HSL's adoption of GitHub Advanced Security for Azure DevOps introduced three crucial security capabilities:

  1. Secret Scanning: Automatically detects and prevents accidental commits of credentials like API keys
  2. Dependency Review: Identifies vulnerable components in open-source dependencies
  3. Code Scanning: Uses CodeQL to find security vulnerabilities during development

"We shifted from reactive security patches to proactive vulnerability prevention," explains HSL's Security Lead in the Microsoft case study. The implementation achieved:

  • 100% visibility into codebase vulnerabilities
  • 80% reduction in critical security findings reaching production
  • 60% faster remediation of identified issues

DevSecOps Transformation in Action

The integration created a security-focused development culture through:

Automated Security Gates

  • Pre-commit hooks blocking secrets in code
  • Pull request checks for vulnerable dependencies
  • Build pipeline security validation steps

Security Champion Program

HSL trained developers across teams to:

  • Interpret security findings
  • Prioritize fixes based on risk
  • Advocate for security best practices

Compliance Reporting

Automated documentation for:

  • PCI DSS requirements 6.3.1 (secure development processes)
  • GDPR Article 25 (data protection by design)
  • NIS Directive obligations

Measurable Business Impact

Beyond security, the solution delivered operational benefits:

Development Efficiency
- Reduced security-related rework by 45%
- Shortened compliance audit preparation from weeks to days

Cost Savings
- 30% decrease in post-release security hotfixes
- Lower risk of regulatory penalties

Service Reliability
- Fewer production incidents related to security flaws
- Enhanced passenger trust in digital services

Lessons for Other Public Sector Organizations

HSL's experience offers valuable insights:

  1. Start Small: Begin with high-risk repositories before organization-wide rollout
  2. Integrate Gradually: Phase in scanning capabilities to avoid overwhelming teams
  3. Focus on Education: Pair tools with training to build security awareness
  4. Measure Progress: Track metrics like mean-time-to-remediate (MTTR) for vulnerabilities

Microsoft's Azure DevOps Product Lead comments: "HSL demonstrates how public sector entities can modernize securely. Their approach balances innovation with responsibility."

The Future of Secure Public Transport Systems

As HSL continues its digital transformation, the organization plans to:

  • Expand security scanning to infrastructure-as-code templates
  • Implement continuous compliance monitoring
  • Share best practices with other European transport agencies

With cyber threats evolving daily, HSL's proactive security investment positions Helsinki as a leader in resilient urban mobility systems. Their success proves that robust application security isn't just for tech companies - it's essential infrastructure for modern cities.