Privilege you can prove —
without exposing the file.
Privileged communication and records protected by client-side encryption and customer-held keys. ASTIS never receives the document — and you can demonstrate confidentiality and integrity to a client, a counterparty, or a court.
Infrastructure access shouldn't mean privileged-document access.
The privileged file never crosses our boundary
Encrypted on your side
Documents are encrypted before they leave your boundary. ASTIS receives sealed capsules and metadata — never privileged content.
Provable integrity
Sign and verify by hash to show a record is authentic and unaltered — without disclosing the document itself.
You hold the keys
Per-client, per-matter custody. With HYOK CVS, even ASTIS cannot read the file — the key is never ours to hold.
How ASTIS maps to your professional duties
ASTIS is designed to support these obligations. It is not legal advice and not a substitute for your firm's own compliance and ethics program.
Keep client matters confidential
Duty of confidentiality
Privileged content is encrypted client-side. The ASTIS edge only handles encrypted capsules and metadata — never the document. Supports your professional duty of confidentiality (e.g. ABA Model Rule 1.6, SRA Code, EU bar equivalents).
Prove a record was not altered
Authenticity & integrity
Hash-based signing and verification demonstrate a contract or filing is unchanged — without ever sharing the document with the signer or a third party.
Show who could access what
Records of access
A tamper-evident, hash-chained audit trail of cryptographic and key operations — exportable for clients, opposing counsel, or a court.
Keep counsel in control of the keys
Custody & matter isolation
Per-matter and per-client key custody. With HYOK CVS, decryption authority stays on your infrastructure — even ASTIS cannot read the file.
Limit what crosses the wire
Cross-border & data minimization
Only sealed artifacts travel; format-preserving encryption keeps sensitive fields usable but unreadable. EU/EEA data plane for GDPR-sensitive matters.
Where it fits in practice
Privileged client communication
Protected messages and documents between counsel, clients, and co-counsel — without privilege becoming ordinary mailbox plaintext.
M&A & secure deal rooms
Share drafts and diligence material as sealed artifacts; counterparties and vendors get ciphertext, you keep the keys.
Contract signing & verification
Sign and verify executed records by hash — provable authenticity without re-uploading the document to a third party.
Matter records & legal hold
Tamper-evident records of access and a hash-chained audit trail across the life of a matter, exportable on demand.
Honest boundary
- • ASTIS is designed to support confidentiality and integrity obligations. It is not legal advice and does not replace your firm's compliance and ethics program.
- • Because privileged content never crosses the ASTIS edge (client-side + HYOK CVS), ASTIS minimizes its role as a processor of privileged material.
- • Verifiable today via internal dogfood and independently verifiable artifacts; SOC 2 Type II is in progress (CASA Tier 2 complete). Not yet a third-party audit.
Keep privilege where it belongs — with counsel.
Let's scope a deployment for your matters, clients, and data-residency needs.
Talk to ASTIS