Use AI on contracts, case files, research notes, and client correspondence without putting privileged material into an operator-readable system.
Legal
Legal teams only benefit from AI if they can use real matter material, and that breaks down the moment a provider can technically inspect the plaintext.
“We’d use AI for summarising notes and drafting reports, but data privacy blocks us.”
Partner, Luxembourg law firm
Professional secrecy obligations do not allow “we promise not to look.” Tresor’s verification receipts give you per-message evidence that confidentiality was maintained, the kind of proof a regulator or client security team can actually audit.
Case files, contract drafts, and client notes stay inside a protected workspace instead of being copied into consumer AI tools.
Teams can draft against their own material and review process instead of hoping a general AI tool will respect internal standards.
Shared projects keep research, conversations, and supporting files together without opening unrelated matters to the whole firm.
Contract review, case research, deposition summaries, and client correspondence become usable with AI once the system is built so even the operator cannot read the material.
Retrieve the relevant clause, precedent, or note across large document sets in one protected workspace.
Prepare first drafts, redlines, and internal summaries without moving privileged text into a public AI environment.
Reduce hearing notes, depositions, and correspondence chains into faster review loops for lawyers and support staff.
The system has to satisfy partners, clients, and security reviewers without asking any of them to accept a black box.
Privileged documents, case files, and client correspondence stays readable only in the browser and inside attested compute, not in an operator-accessible app tier.
Routing, storage, and execution stay aligned with European sovereignty and procurement expectations instead of backhauling work into a general public AI stack.
Each response can be tied back to cryptographic receipts and published verification material, so security and compliance teams can check the claim themselves.
Most firms start with one matter type or one drafting workflow, keep the supporting files in a shared project, and widen the rollout only after internal review is comfortable.
Contract review, internal research, or document summarization are often the safest starting points.
Projects make it easier to collaborate without exposing unrelated work across the whole firm.
Once lawyers and security leads understand the verification posture, the same setup can support wider firm usage.
Executive Summary
Tresor is built on a simple promise: your conversations belong to you, not us. Every message you type is protected by end-to-end encryption and processed only inside secure computing environments that even Tresor cannot inspect. Teams can now collaborate inside shared workspaces without ever handing Tresor access to their plaintext. This whitepaper explains the principles and safeguards behind Tresor’s zero-access design, showing how we deliver practical confidentiality without trade-offs in usability.
The best of open source, isolated and verifiable in Zero-Access TEEs.
