Secure cloud storage for professionals (lawyers, accountants, doctors): the guide

Certain professions are bound by a legal duty of confidentiality — lawyers, accountants, healthcare professionals. Storing clients' or patients' documents on a consumer cloud raises a real question: who can technically access these files?

The problem with consumer clouds

A cloud that encrypts "at rest" but holds the decryption key could, in theory, be compelled to hand over the content of your files under a legal order — including from abroad, if the host is subject to extraterritorial legislation such as the US CLOUD Act. For a lawyer bound by absolute professional secrecy, that's not an academic hypothesis: it's a direct professional-conduct risk.

What zero-knowledge encryption changes in practice

• Lawyers: client files, privileged correspondence, procedural documents — no third party, including the host, should be able to access them.
• Accountants: balance sheets, clients' banking and tax data, whose disclosure would carry professional liability.
• Doctors and healthcare professionals: patient records, test results — subject to medical confidentiality, but E2E encryption on supporting documents remains a relevant extra layer of protection.

With a zero-knowledge architecture like May·Secret's, even under a legal request addressed to the host, it can only hand over encrypted files, unreadable without the professional's private key — a key that never leaves their device.

What to check before choosing a professional cloud

1. Does encryption happen client-side, before upload (E2E), or only on the servers (at rest)?
2. Where is the data hosted (France, EU, outside the EU)?
3. Does the provider offer protected file sharing (expiring link, password) to send documents to clients or colleagues?
4. Is there a Teams plan to share folders between partners while keeping fine-grained permission control?

May·Secret meets all four criteria, with hosting in France and a Teams plan designed for firms and practices. See our plans and pricing.