Innovators at these companies trust us

Security, compliance and control are not nice-to-haves

AI projects don't fail only because of models or data quality; they often fail due to missing governance, sloppy deployments and lack of auditability. If access rights, data flows or logging are not defined from the start, blind spots appear that can lead to fines, operational outages and reputational damage. A robust, practice-oriented AI security strategy is therefore indispensable.

Why we have the expertise

Our teams combine engineering depth with regulatory understanding: we don't just build proofs, we operationalize security and compliance requirements in real deployments. In doing so, we address concrete topics such as Deployment Hardening, Data Isolation and Auditability — from architecture to process.

We work cross-functionally: security engineers, data engineers, privacy experts and product owners deliver usable solutions together. This interdisciplinary setup allows us to build technically robust and auditable pipelines that also meet the requirements of ISO 27001, TISAX or industry-specific regulations.

Our work is aimed at responsible parties who want actionable architectures and clear roadmaps, not slides. We take on operational responsibility and deliver technical artifacts, audit trails and automations that make day-to-day operations safer.

Our references

In the automotive industry we implemented an NLP-based recruiting chatbot project for Mercedes‑Benz that combines 24/7 candidate communication with automated pre-qualification — including requirements for data security, logging and GDPR-compliant candidate handling. The combination of product and compliance requirements showed us how important strict access control and audit logs are.

In the manufacturing environment we implemented several projects with STIHL and Eberspächer that, in addition to production modules, included security and safety assessments, data governance mechanisms and secure architectures. These projects cover training tools, simulation software and production optimization — each with high demands on availability and traceability.

Additional technical work for BOSCH, AMERIA and FMG demonstrates our experience with go-to-market preparations, touchless control integrations and document-based AI solutions where compliance and traceability are central requirements.

About Reruption

Reruption builds AI capabilities from the inside out: we act as co-preneurs, take on entrepreneurial responsibility and deliver results instead of recommendations. Our approach combines Velocity, technical depth and an AI-first perspective that rethinks processes — not just safer, but also more efficient.

We focus on four pillars: AI Strategy, AI Engineering, Security & Compliance and Enablement. The result is solutions that don't optimize the status quo but replace it — secure, auditable and scalable.

Do you want to make your AI deployments auditable and legally secure?

Schedule a short audit check-up: we quickly identify the most critical risks and deliver an actionable immediate plan.

What our Clients say

Hans Dohrmann

Hans Dohrmann

CEO at internetstores GmbH 2018-2021

This is the most systematic and transparent go-to-market strategy I have ever seen regarding corporate startups.
Kai Blisch

Kai Blisch

Director Venture Development at STIHL, 2018-2022

Extremely valuable is Reruption's strong focus on users, their needs, and the critical questioning of requirements. ... and last but not least, the collaboration is a great pleasure.
Marco Pfeiffer

Marco Pfeiffer

Head of Business Center Digital & Smart Products at Festool, 2022-

Reruption systematically evaluated a new business model with us: we were particularly impressed by the ability to present even complex issues in a comprehensible way.

Our approach: From risk analysis to audit-ready operation

Our process aims to make AI applications secure from concept to productive, audit-ready operation. We combine technical hardening with processes, documentation and automation so that compliance requirements such as TISAX or ISO 27001 are not only met but operationalized. Central elements are Data Governance, Access Controls and Audit Logging.

Phase 1 — Risk and compliance assessment

At the outset we conduct a comprehensive assessment: we identify data flows, contractual requirements, regulatory obligations and internal policies. The goal is a prioritized list of real risks, not an abstract checklist. We also map sensitive data, potential side effects of model outputs and legal pitfalls.

Based on the assessment we develop a tailored roadmap with clear milestones, responsibilities and success criteria. This roadmap also includes an initial Privacy Impact Assessment (PIA) and a risk scale according to likelihood and impact.

Phase 2 — Architecture, data separation & secure self-hosting

In phase 2 we design a secure target architecture: clear zone models for networks, separate storage layers for PII and operational data, and options for Secure Self-Hosting or hybrid operation. We evaluate trade-offs between cloud and on-prem solutions and recommend the appropriate option for your risk and compliance profile.

Data separation, classification and lineage are key elements. We implement automated classification rules, retention policies and proof paths so that every data change and every access can be traced. These measures form the basis for auditability and later certifications.

Phase 3 — Controls, hardening & automation

Once the architecture is in place, we implement technical controls: fine-grained model access, role and permission models, secrets management, network segmentation and hardening of deployments. We use industry best practices and create standardized templates for ISO/NIST-compliant controls.

In parallel we build audit and monitoring pipelines: comprehensive audit logging, anomaly alerting and automated compliance reports. Our automation reduces manual effort during audits and increases the reliability of evidence. Deliverables include concrete runbooks, Terraform modules and audit dashboards.

Phase 4 — Safety testing, red-teaming & operations

Security is an ongoing process. We conduct comprehensive safety tests, adversarial evaluations and red-teaming to examine model behavior, prompt-injection risks and output hallucinations. The tests are practical and reflect real threat scenarios.

For operations we create playbooks for incident response, data breach management and regular compliance checks. We train operations teams, establish roles such as Security Champion and Audit Owner, and assist in implementing change management processes so that security measures remain effective in the long term.

Deliverables, team and timeline

Our typical outputs include: risk assessment report, PIA, architecture diagrams, implemented controls (IAM, logging, networking), compliance templates (ISO/NIST), red-teaming reports and an implementable operating model. The team composition includes security engineers, data engineers, privacy experts and product owners.

A typical engagement lasts, depending on scope, 6–16 weeks for the initial phase, followed by a 3–12 month migration and operations support program. We deliver measurable success criteria: reduced attack surface, complete audit trails, defined SLA and recovery times, and successful internal or external audits.

Success metrics and common challenges

We measure success using technical and organizational KPIs: time-to-detect, mean time-to-respond, number of open compliance findings and audit-readiness level. In addition, we assess model performance in the context of safety metrics: false-positive rates, hallucination rates and robustness against adversarial inputs.

Common challenges include unclear data ownership, legacy infrastructures and missing processes for model updates. Our answer is pragmatic: we provide integration paths for existing tools, incremental hardening steps and clear responsibilities so that security is implemented not on a greenfield site but in real-world operations.

How we ensure sustainability

Security and compliance are not one-off projects. We build transfer processes, documentation and enablement programs so your teams can operate the solutions themselves. Regular reviews, automated compliance scans and training ensure that changes to models or data flows do not automatically create new risks.

In summary, we deliver not only recommendations but deployable artifacts, operational documentation and metrics that make your AI solutions secure, auditable and future-proof.

Ready for a technical proof-of-security?

Let us demonstrate hardening, logging and data separation in a short PoC — with clear recommendations for production.

Frequently Asked Questions

An effective starting point is a focused risk assessment that combines technical, legal and organizational aspects. We recommend first mapping the data flows and target use cases: where does the data come from? Which systems access it? Which outputs are critical? These questions create clarity about the attack surface.

In parallel, a PIA (Privacy Impact Assessment) should be carried out to identify and prioritize data protection risks. A PIA is particularly important when personal data or sensitive operational data are involved. It provides concrete measures and helps involve the data protection officer.

Technically, we review access rights, logging, network boundaries and model hosting options. A proof-of-concept for secure self-hosting or isolated environments helps identify real limitations. The goal of the first assessment is a prioritized roadmap with clear milestones and responsibilities.

Practical tip: involve stakeholders from legal, security, IT and the business unit early. Without shared prioritization an assessment often becomes a non-binding list. With clear KPIs and responsibilities, however, it creates urgency and progress.

Data governance is the backbone of secure AI systems. Without clear classification, retention policies and lineage, neither auditability nor responsible model operation is possible. Governance defines which data may be used, who has access and how long data should be retained.

We implement automated classification mechanisms, document data provenance and transformations, and set up retention workflows. This makes it possible, for example, to reconstruct training datasets and trace decisions during audits — a decisive factor for ISO or TISAX checks.

Data governance also reduces technical risks: by separating PII from operational data early, you minimize leak risks and simplify the implementation of self-hosting options. Governance also enables clear assignment of responsibilities between data owners, data stewards and engineering teams.

In short: good governance is not bureaucratic overhead but an enabler for robust, scalable and auditable AI operations — and thus a core component of any security strategy.

Self-hosting makes sense when legal, regulatory or data protection reasons exclude the use of public models or third-party hosted services. It can also be the better choice when there are high requirements for latency, cost control or operational SLAs.

Technically, self-hosting starts with an assessment of infrastructure requirements: compute, storage, network segments and backup strategies. We recommend zone-based architectures in which sensitive workloads run in isolated environments and API gateways provide controlled access.

Security aspects such as secrets management, hardening container images, network policies and regular patch strategies are central. In addition, we implement audit logging and monitoring so that all inputs and outputs are traceable. These measures are necessary to demonstrate compliance.

We build self-hosting solutions iteratively: first a minimally secure setup for testing, then stages toward production readiness with automation and hardening. This avoids a monolithic lift-and-shift and reduces risks during migration.

Auditability is achieved through three pillars: complete data lineage, comprehensive audit logs and reproducible model training runs. We ensure that every change to data, pipelines or models is versioned and documented. This way, decisions can be traced back to the training data used.

For audit logs we implement standardized events: data access, model inference, parameter changes, permission changes and deployments. These logs are stored securely, made tamper-evident and fed into reporting pipelines that auditors can easily review.

In addition, we provide reproducibility artifacts: training manifests, checkpoints, seed configurations and evaluation metrics. These artifacts make it possible to reproduce models with identical configuration, which is often required in regulatory audits.

The organizational side is also important: responsibilities, reviews and change-approval processes must be defined. Without clear governance, the best logging is of little use because responsibilities are missing.

Red-teaming goes beyond classic penetration tests: it simulates targeted attacks on model behavior, prompt injection, data spoofing and manipulation of outputs. The goal is to identify weaknesses in the interaction between model, input processing and the environment.

A typical red-team engagement includes adversarial attacks, input fuzzing, prompt manipulation tests and scenarios for data exfiltration. We analyze how the system reacts to unexpected or malicious inputs and whether outputs could trigger incorrect actions.

The frequency depends on risk and the rate of change: for stable systems a comprehensive test every six to twelve months is sufficient; for rapidly iterating models we recommend quarterly checks. After any significant change to the model, data pipelines or permissions, a targeted test should be performed.

It's important that red-teaming becomes a continuous process: test results must lead to improvements, vulnerabilities must be closed and tests repeated. Only then does real resilience emerge.

We work pragmatically with established standards such as ISO 27001, NIST frameworks and industry-specific schemes like TISAX. Our goal is to translate the requirements of these standards into concrete technical and organizational measures that can be proven automatically.

In certification projects we support gap analyses, preparation of required documentation and the implementation of audit-relevant controls. We provide templates, policies and technical artifacts that auditors can inspect directly.

Our approach is pragmatic: we prioritize measures by risk and feasibility and implement the low-hanging fruit first to achieve quick compliance improvements. In parallel we build out longer-term elements such as governance programs and automation.

In the end we accompany the audit, provide the technical evidence and ensure that your organization is not only audited but remains continuously audit-ready.

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Philipp M. W. Hoffmann

Founder & Partner

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Reruption GmbH

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70176 Stuttgart

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