Security

Build Resilience. Reduce Risk. Protect What Matters.

Cybersecurity is no longer just a technology concern.

As organizations become increasingly digital, security directly impacts business continuity, operational resilience, regulatory compliance, customer trust, and organizational reputation.

Today's threat landscape is evolving faster than ever. Attackers leverage automation, artificial intelligence, social engineering, and increasingly sophisticated techniques to target critical systems, data, and business operations.

Crossjoin ensures your IT is fast, reliable, and secure while enabling your business to proactively manage risks by proactively identifying vulnerabilities, strengthening security controls, reducing risk exposure, and improving cyber resilience across the entire technology landscape.

Our holistic, end-to-end security methodology includes assessments, reporting, implementation, and validation, ensuring your IT systems are fully optimized and secure.

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Why Security?

Modern organizations face growing security challenges:

  • Increasingly sophisticated cyber threats
  • Expanding attack surfaces across cloud and hybrid environments
  • Regulatory and compliance pressures
  • Emerging AI and LLM-related risks
  • Third-party and supply chain vulnerabilities
  • Human-factor security risks
  • Limited visibility across complex ecosystems

 

Crossjoin addresses these challenges through an end-to-end security approach that combines offensive security, governance, architecture validation, compliance readiness, and continuous improvement.

What Security delivers?

Offensive Security
& Agentic Pentesting

AI-Accelerated Full-Stack Pentesting:
We execute multi-layered penetration testing across Web Applications, APIs, Cloud Environments, Microservices, enterprise LLMs, COTS and legacy platforms using a hybrid model that combines experienced ethical hackers with battle-tested AI testing agents and SAST/DAST tooling. By deploying specialized LLM reasoning engines and autonomous tool-use agents into our offensive workflows, we instantly automate high-volume reconnaissance, scan broad attack surfaces, and continuously fuzz runtime behaviour at production scale.et, consectetur adipiscing elit. Mauris eu massa orci.
Human-Led Exploit Chaining:
While autonomous AI agents systematically map the environment and isolate baseline vulnerabilities, our expert human practitioners step in to weaponize complex findings against your assets. We focus human ingenuity on business logic flaws, complex multi-step exploit chaining, and post-exploitation validation that automated systems cannot contextualize to ensure operational resiliency.
Advanced Application & LLM Target Testing:
Our technical scope explicitly covers modern threat surfaces within your application ecosystems. We actively test and validate your deployments against critical modern attack vectors, including prompt injection, systemic data leakage, and insecure plugin integrations, ensuring that layered application extensions do not create backdoors into your core enterprise databases.
Multi-Vector Social Engineering & Staff Preparedness:
We test your organizational perimeter across digital, wireless, and physical vectors to identify real-world workforce vulnerabilities. Rather than relying solely on standard email templates, our exercises simulate advanced, multi-tiered adversarial tactics such as:
  • Digital & AI Phishing: Utilizing generative LLM pipelines to orchestrate hyper-personalized, multi-turn phishing, vishing, quishing, spearphishing, and credential-harvesting simulation campaigns that mirror automated modern threat actor workflows.
  • Wireless Deception (Evil Portals): Deploying rogue access points and clone captive portals within or near your corporate facilities to evaluate employee susceptibility to credential harvesting and untrusted network connections.
  • Physical & Boundary Testing (Tailgating & USB Baiting): Testing physical access control points via authorized-person follow-throughs (tailgating) and deploying tracked, unverified physical media drops to measure workforce adherence to clean-desk and hardware policies.
  • Protocol Tailoring & Baseline Remediation: Every exercise serves to measure your operational baseline. We transform assessment metrics directly into actionable insights, helping your leadership refine corporate security incident protocols and deploy highly targeted, evidence-based staff awareness programs.
Holistic Application Security (DevSecOps):
Move beyond treating source code as an isolated silo. We approach application security from a comprehensive architectural point of view, evaluating how your software interacts with container runtimes, message brokers, third-party dependencies and cloud services. We integrate automated testing gates directly into your CI/CD pipelines to make continuous verification a shared engineering responsibility.
Framework Hardening & Threat Modelling:
Map your system components to globally recognized defensive baselines, including the OWASP Top 10, OWASP ASVS, and CIS Benchmarks. We perform structural threat modelling during product design and post-implementation phases, verifying everything from architecture design to host-level security configuration defaults and source code.
Emerging Tech & LLM Validation:
As part of our broader testing ecosystem, we run specialized adversarial evaluations for enterprise LLM integrations, checking your AI-driven systems for task hijacking, prompt injection vulnerabilities, data leakage, and insecure plugin and skills dependencies.

Holistic Architectural & Application Security

Compliance Framework Enforcement (GRC):

Manage uncertainty and maintain integrity with an integrated GRC strategy.
Map asset security directly to mandatory European standards. We build actionable readiness roadmaps for compliance across ISO27001, NIS2, DORA, GDPR, and national legal requirements like RJSC (Regime Jurídico da Segurança do Ciberespaço)

SLEEP WELL

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Business Outcomes

Our SECURITY approach helps organizations build trust, resilience, and long-term protection.

RISK REDUCTION

Protecting your Business

We ensure that risks are mitigated before they become real threats. We carry out detailed analyses and implement robust security practices to drastically reduce the likelihood of cyberattacks, operational failures, and data breaches.

OPERATIONAL EFFICIENCY

Optimized Performance with Safety

We guarantee streamlined operations that boost the performance of your business. Through best practices, we offer robust security without compromising the speed and productivity of your team.

COMPLIANCE

Compliance Guarantee

We ensure that your services fully comply with the main security standards and regulatory requirements, minimizing the risk of penalties and guaranteeing that your business operates safely and reliably.

END-TO-END SECURITY

Complete Security

We offer an integrated security approach that covers the entire lifecycle of your solution, from vulnerability assessment to post-implementation validation.

Security & Performance by Design

We understand that system performance is not just about performance and efficiency, it also encompasses ensuring high-security standards, essential for protecting customer data. We can state that the mission of data protection consists of guaranteeing the integrity and confidentiality of information and preventing unauthorized access or changes.

Furthermore, it involves the protection of computer systems and networks, ensuring that all security measures are in place to effectively fulfill this mission. To address Internet security challenges and ensure the protection of customer data, Crossjoin takes a multifaceted approach to its core service offerings.

In every service we provide, security is considered an essential factor and present in any context, which allows us to easily take advantage of a ‘2 in 1’ approach. This means that, with the required capabilities and fieldwork in a performance service, systems administration, or even development or solution architecture, we can add additional value to our deliverables with almost immediate security validations to ensure that Our clients’ solutions are appropriate and aligned with best practices.

With these validation measures and comprehensive security audits, Crossjoin not only addresses today’s Internet security challenges but also ensures that our performance optimizations do not compromise the security and integrity of customer data. Our mission is to deliver performance by design, considering security as a fundamental pillar of our approach.

Crossjoin stands out in the market for its unique approach to security, serving as a strategic partner for large companies in critical sectors such as telecommunications, insurance, and finance.

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Case

STUDIES

Multinational Insurance

Application and Infrastructure Security Review

Crossjoin performed an evaluation of an in-house solution hosted in the cloud providing expert recommendations covering best practices for secure coding, security guidelines for product configuration management in the cloud and secure communication and order handling.

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Portugal Telco

Solution Security Audit

Crossjoin mission was an independent internal audit of its ISO 27001-compliant ISMS and ISO 22301-compliant BCMS, emphasis on delivering actionable findings to improve and correct current practices while prioritizing the most impactful measures to enhance overall security.

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Heads of
Department

Tiago Alcobia

Security Delivery Manager