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By Jeff Jenkins | Chief Information Security Officer, LexisNexis Legal & Professional
Summary
The rise of powerful generative artificial intelligence (Gen AI) models that can quickly obtain answers to research queries, summarize lengthy documents and create synthetic text for lawyers offers exciting possibilities for transforming the practice of law. But it also raises important questions around data privacy and security.
Law firms are in the business of handling sensitive client information, which means that privacy and security in AI is paramount. At LexisNexis, building trusted AI systems while protecting customer data is our top priority, so our customers can feel confident in upholding their ethical and legal obligations to clients, minimize professional risks and safeguard valuable information.
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From end-to-end encryption and multi-factor authentication to ongoing audits, we apply gold-standard protections across our infrastructure. Our processes create AI that thoughtfully addresses areas of concern such as data privacy, data bias, misinformation, attribution, transparency and governance.
Here are key ways that LexisNexis secures and governs AI for our customers:
We protect your data wherever it goes. At rest, it’s locked down with Advanced Encryption Standard (AES)-256 encryption- a super-advanced digital lock that requires a 256-bit key, which is virtually unbreakable with current technology. It would take longer than the universe has been in existence to crack, even for a supercomputer.
When your data’s in transit, we use TLS 1.2 protection or higher, which not only encrypts data but also authenticates the server and verifies data integrity, so you can be assured that your data isn’t tampered with.
It’s the gold standard of security privacy used by federal governments and the Department of Defense.
We never use customer data to train our AI models, ensuring your confidential information stays private, with robust data retention and deletion policies in place.
All prompts and user interactions are pseudonymized—meaning identifiable information is removed—allowing us to improve performance without compromising your privacy.
Our systems are certified for SOC Type I & II compliance, set by the American Institute of CPAs (AICPA), meeting rigorous standards focusing for data security and availability.
These certifications are maintained through continuous monitoring and third-party audits.
LexisNexis brings decades of experience in secure system design. Our use of generative AI builds directly on this legacy. From preventing bias to ensuring human oversight, we adhere to RELX’s Responsible AI framework, which requires that AI protects privacy, is explainable, and is aligned with real-world impact.
We don’t just have humans in the loop. We leverage over 300 J.D. experts to evaluate the system and adjust pretrained large language models (LLMs) to improve performance based on legal tasks through a proprietary LexisNexis process called fine-tuning. This allows our system to be more effective in understanding and accomplishing legal tasks efficiently.
We utilize Retrieval-Augmented Generation (RAG), another LexisNexis proprietary process, to optimize user’s prompts and ground the generated responses in our trusted sources, ensuring the system provides the best possible, most relevant answer for the user, prioritizing legal accuracy.
Using embeddings, we translate complex legal text into a format that AI can easily understand, enabling smarter search and more accurate results. This approach allows the system to efficiently surface relevant information from across our massive content library, improving speed and precision for legal professionals.
Trust is earned—and at LexisNexis, we earn it by putting security, transparency, and human expertise at the core of our AI offerings. Whether you're drafting documents or conducting legal research, you can be confident that your data is safe, your tools are reliable, and your AI is built to uphold the highest standards in the industry.
Discover how LexisNexis is setting the standard for responsible, secure AI in legal technology. Learn more about our ground-breaking AI-powered solutions: Protégé™ in Lex Machina, Create+ and Lexis+ AI®.
For more information on LexisNexis products and to connect with a sales representative, contact us today.
This article was originally published May 8, 2024 and was updated on July 28, 2025.