Defending a consumer-IoT manufacturer against a data-security class action, Law & Forensics' cybersecurity expert delivered a reliability-tested opinion that withstood a Daubert challenge and reframed the alleged "defect" on the actual technical record.
The situation
A consumer connected-device manufacturer faced a putative class action alleging that its home devices were defectively insecure and had exposed millions of consumers to a heightened risk of data harm. Plaintiffs' expert advanced sweeping opinions — broad characterizations of vulnerabilities and generalized claims of injury — and those opinions were doing real work: class certification depended in part on whether the alleged security "defect" could be proven on a classwide basis through reliable expert methodology.
Our client needed more than a contrary opinion. It needed a cybersecurity expert whose rebuttal would itself survive Daubert scrutiny and whose independent testing could expose the gap between the plaintiffs' theory and the devices' actual security posture.
Our approach
Law & Forensics provided a testifying cybersecurity expert and a supporting technical team, working in parallel:
Independent device and firmware testing. Rather than respond on paper, the expert acquired and tested the accused devices across multiple firmware generations, documenting actual behavior, attack surface, and exploitability under controlled, reproducible conditions.
Standards-based benchmarking. The team evaluated the devices' security posture against recognized industry frameworks and contemporaneous norms, distinguishing genuine deficiencies from the plaintiffs' speculative, worst-case framing.
Reliability-first report. Every step of the analysis — tooling, test configuration, sampling, and inference chain — was documented so the methodology could be independently reproduced, building the record needed to defeat a reliability challenge before it was filed.
Daubert and deposition defense. The expert defended the opinions through a Daubert motion and deposition, and the same documented methodology was used affirmatively to attack the unsupported leaps in the opposing report.
The impact
The court admitted our expert's testimony and excluded key portions of the opposing expert's opinions as unreliable. With the plaintiffs' classwide "defect" theory stripped of its expert foundation, the certification posture shifted decisively in our client's favor. The engagement demonstrated that, in security class actions, a rigorously documented methodology is as load-bearing as the conclusion it supports.
| Metric | Result |
|---|---|
| Daubert challenge to our expert | Testimony admitted |
| Opposing expert opinions excluded as unreliable | Key portions struck |
| Device and firmware versions independently tested | Multiple generations |
| Benchmark basis | Recognized industry security standards |
