Before putting client information into a local AI tool, trace where every part of the workflow goes—not just where the model runs. Prompts and documents may be processed on a firm-controlled computer while indexes, logs, telemetry, updates, backups, or support features travel elsewhere. Configure the whole system, preserve human review, and check the rules and client obligations that apply to your practice.
Start by defining what “local” means in your setup
“Local” describes a deployment only as precisely as its actual data flows do. A model may run on a workstation while its interface, document connector, telemetry, update service, or remote-support tool communicates with an outside service. Conversely, a tool may be installed on a firm network without every component or administrator being under the firm’s control.
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Map the data path for each type of information before use:
- Inputs: prompts, uploaded files, extracted text, and document metadata.
- Derived data: embeddings, search indexes, cached content, and intermediate files.
- Outputs and records: generated answers, conversation history, application logs, crash reports, and audit records.
- Copies and access paths: backups, synchronization, remote administration, connectors, support tools, and update checks.
For each component, establish where data is processed and stored, who can access it, whether it leaves the firm-controlled machine or network, and how long it remains. NIST’s National Cybersecurity Center of Excellence described an internal chatbot designed to keep interactions within its secure network in an initial public draft of NIST IR 8579 dated July 2025. That is one implementation, not proof that other products—or every component around a locally run model—keep data inside a firm’s network.
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Check the settings and controls before entering client information
1. Confirm retention, reuse, and deletion
Read the application’s settings and applicable terms for retention periods, whether inputs or outputs may be reused or used for training, telemetry, cloud synchronization, data ownership, and deletion. Find out what happens to stored information when you delete an account, end a service, change vendors, or remove the application. Check both the visible interface and any connected service: North Carolina State Bar Formal Ethics Opinion 1 warns that an in-house derivative of an AI program may still send information to a central program.
2. Limit access to the application and its data
Restrict access to the AI tool, client source files, indexes, logs, and backups to people who need it for their work. Use individual accounts where available, remove access when a person’s role changes, and reserve administrator privileges for administration. Apply the firm’s access rules to the stored files and indexes as well as to the AI interface; protecting one does not automatically protect the others.
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NIST’s February 2024 SP 1300, a small-business cybersecurity guide, recommends limiting sensitive-information access to those who need it. It is baseline security guidance, not a legal-sector certification or a substitute for reviewing a specific deployment.
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Enable multifactor authentication (MFA) for accounts that can reach sensitive client material or administer the system. Prefer phishing-resistant methods where available, particularly for sensitive information and elevated privileges. NIST’s small-business MFA guidance was updated January 5, 2026.
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- 【Superior Privacy】- Our advanced multi-layered film filter blacks out your screen when viewing from the side, while maintaining a crystal clear screen straight-on. It also protects your eyes from harmful UV and blue light. [Note: It does not block visibility directly behind you, regardless of the distance.]
- 【Perfect for Travel and Open Workspaces】- The Laptop Privacy Screen Filter is the ideal solution for healthcare providers, mobile workers, commuters, students, and business travelers. Now you can stay compliant and safeguard sensitive corporate information while working in airplanes, subways, airports, and public areas.
- 【Package Contents】- Each package includes a magnetic privacy screen filter, magnetic stickers, a webcam privacy cover, a storage folder, and a cleaning cloth. Buy with confidence – located in the US, Sight Pro specializes in providing best-in-class privacy solutions to individuals, small businesses, corporations, government, and educational institutions. Our privacy screens are Section 889 and TAA compliant.
4. Protect the device and stored data
Enable full-disk encryption on laptops and tablets that hold client data. Keep the operating system, AI runtime, dependencies, and supported security software updated, and use firewall and endpoint protections appropriate to the firm’s environment. NIST SP 1300 specifically recommends full-disk encryption for laptops and tablets and automatic updates.
5. Review network access instead of assuming it is harmless or unnecessary
Identify which network connections the deployment needs for model downloads, updates, connectors, remote access, and support. Disable unnecessary exposure and follow firm policy for inbound and outbound connections. Disconnecting a machine from the internet does not, by itself, secure its stored files, removable media, local user accounts, or a compromised endpoint. NIST IR 8579’s draft discussion of LLM risks includes unauthorized access and data exposure.
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- 【Two Attachment Options】- Installs in minutes. Option 1 uses clear adhesive strips that securely attach to any screen. Option 2 uses slide mount tabs that easily stick to the display frame, allowing you to slide the filter on and off the screen as needed.
- 【Superior Privacy and Reduce Glare】- Our advanced multi-layered film filter blacks out your screen when viewing from the side, while maintaining a crystal clear screen straight-on. It also protects your eyes from harmful glare, UV, and blue light. [Note: It does not block visibility directly behind you, regardless of the distance.]
- 【Perfect for Travel and Open Workspaces】- Our computer screen privacy filter is the ideal solution for healthcare providers, mobile workers, commuters, students, and business travelers. Now you can stay compliant and safeguard sensitive corporate information while working in airplanes, subways, airports and public areas.
- 【Package Contents】- Each package includes one privacy screen shield filter, two sets of clear adhesive strips, two sets of slide mount tabs, and a microfiber cleaning cloth. Buy with confidence – located in the US, Sight Pro specializes in providing best-in-class privacy solutions to individuals, small businesses, corporations, government, and educational institutions. Our privacy screens are Section 889 and TAA compliant.
6. Protect backups and test restoration
Decide which client files, indexes, and configuration must be recoverable; protect their backups and limit who can restore them. Test restoration rather than assuming a backup is usable. Whether model files also need backup depends on recoverability and licensing—do not assume every artifact must be retained.
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Local installation does not transfer professional responsibility
A local deployment does not remove confidentiality duties or the lawyer’s responsibility to use technology competently and evaluate its safeguards. North Carolina Formal Ethics Opinion 1 says lawyers remain responsible for securing information regardless of where a program is located and recommends consulting an IT or cybersecurity expert when storing client information independently. The opinion is specific to North Carolina; lawyers should check the rules and obligations governing their own practice. The ABA’s summary of Formal Opinion 512, released July 29, 2024, highlights competence, confidentiality, client communication, and reasonable fees as relevant duties when using generative AI.
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Resolve privilege questions before sharing client-specific information
North Carolina’s opinion expressly does not decide whether sharing information with an AI tool waives attorney-client privilege. It advises lawyers to resolve privilege questions before engaging a third-party AI program with client-specific information. Consider the governing jurisdiction, the client’s representations and agreements, and the particular information and service involved; a local model label does not answer the privilege question.
Verify legal work independently
Security settings cannot establish that an AI-generated answer is legally correct. Before relying on generated work in a client matter, independently verify authorities, citations, facts, and analysis. The ABA’s Formal Opinion 512 summary and North Carolina Formal Ethics Opinion 1 both underscore that professional responsibility remains with the lawyer.
When to bring in an IT or cybersecurity professional
Ask a qualified IT or cybersecurity professional to review the deployment if the firm stores client information on its own servers, cannot confidently trace where data moves, or lacks the expertise to assess access, retention, backups, and network exposure. North Carolina Formal Ethics Opinion 1 specifically recommends expert consultation for lawyers who plan to independently store client information on local servers. A useful review should examine the complete deployment—including its interface, indexer, connectors, logs, telemetry, update and support paths—not just the model process.
Quick Recap
Before-use checklist
- Map where prompts, documents, extracted text, indexes, outputs, logs, and backups are processed and stored.
- Determine which components communicate beyond the firm-controlled machine or network.
- Check retention, training or reuse, telemetry, sync, deletion, export, and service-termination terms.
- Restrict access to the application, source data, indexes, logs, and backups; use MFA and limit administrator privileges.
- Enable device encryption, maintain updates and endpoint protections, and constrain unneeded network access.
- Protect backups and test recovery for the information the firm must retain.
- Resolve jurisdiction-specific confidentiality and privilege questions, and independently review legal output.
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