Ente successfully completes a security audit

March 22, 2023

We're happy to announce that ente's architecture and source code have been successfully audited by Cure53, in collaboration with Symbolic Software.

Cure53 is a leading German cybersecurity firm and Symbolic Software is a French software consultancy that focuses on applied cryptography and building incredibly hard puzzles.

Together they have certified that ente's architecture is sound and that our implementation across all clients is cryptographically accurate.

We are proud to have received this attestation from two prestigious organizations. Your photos is and always have been end-to-end encrypted on Ente.

The only high severity issue that was discovered during the audit was that we were allowing users to set weak passwords within our web app. This is a high severity issue because weak passwords can be brute forced. We've deployed a fix that prevents setting of weak passwords, and this has been verified by the auditors.

The two medium severity issues that were pointed out were already known and have limited impact in the present day. Implementing these recommendations will harden our protocols further by scoping the impact of compromised encryption keys, so we intend to incorporate them in the future.

We would like to take this opportunity to credit libsodium, the library we rely on to perform all of our cryptographic operations. It exposes high level primitives that make it hard to make mistakes, and we strongly recommend anyone attempting to build an end-to-end encrypted service to read their documentation.

Coming back to the audit, you can find the original report that was shared with us here.

We are grateful that we got an opportunity to work with Dr. Nadim Kobeiassi and Dr.-Ing. Mario Heiderich. They are masters of their domain, and we hope for more opportunities to collaborate in the future.

The best thing that came out of this exercise was that Dr. Nadim signed up for Ente after the audit. It's an honor to receive a public endorsement from a cryptographer of his caliber 😊