Proof, not guesswork.

SureMark is a cryptographic identity and content verification company. We give organizations a way to prove who they are dealing with and what is authentic — in real time — using digital signatures instead of judgment calls.

The platform spans three areas: SureCircle for live identity assurance, Verified Web for browser-side content authentication, and SureDoc for document provenance.

Impersonation. Deepfake video calls, cloned voices, and spoofed executives now drive multimillion-dollar fraud. In one widely reported case, an employee was tricked into transferring roughly $25 million after joining a video call with deepfaked colleagues.

SureMark replaces the unanswerable question — "does this look real?" — with one that has a clear answer: "is this cryptographically verified?"

SureMark was developed by Drs. Stuart Haber and W. Scott Stornetta, the scientists whose early work at Bell Communications Research in blockchain now protects over $2 trillion in digital assets.

Detection tools try to spot fakes after the fact — and attackers keep getting better at fooling them, so detection is a race you can lose.

SureMark takes the opposite approach: provenance. Rather than analyzing whether something looks fake, we cryptographically verify that it is authentic. A signature either checks out or it does not. There is no probability score for an attacker to outrun.

SureCircle is SureMark's real-time identity assurance product. It lets people confirm, on the spot, that the person on the other end of a call or message is who they claim to be — protecting executives and their teams from impersonation.

Each enrolled person holds a cryptographic identity tied to their device. When verification is needed, SureCircle issues a live check that only the genuine key-holder can satisfy, and returns an unambiguous verified / not verified result in seconds.

There are no shared passwords or secret phrases to steal, and no human judgment about whether a face or voice "seems off."

Executive impersonation, deepfake video and cloned voices on live calls, business email compromise, and social-engineering attacks where someone poses as a trusted colleague, vendor, or leader to authorize a payment or extract sensitive information.

No. Enrollment is a one-time setup, and verification afterward is a quick action on the user's own device. The experience is built for executives and everyday staff — not security specialists.

Organization-based user and identity management, an administrator dashboard, role-based access, and access to the mobile apps on iOS and Android — everything an organization needs to roll out and govern verification across its teams.

Provision and remove users, assign roles and seats, and manage access — all from a single console.

SureMark is built for enterprise environments and supports standard onboarding for IT teams. Tell us about your stack during a demo and we will walk through the specifics for your organization.

Cryptographic verification occurs on the user's own device. Trust is established at the edge rather than relying on a third party to vouch after the fact.

SureMark's model is built on cryptographic keys rather than on collecting and warehousing large stores of personal data. Verification proves identity through possession of a key held on the user's device.

Security is foundational to how SureMark is built, and our SOC 2 examination is underway. Contact us for our current security documentation and the status of our compliance program.

Users receive a short, guided enrollment — typically a one-time setup on their device. We provide ready-made onboarding materials for both end users and IT administrators.

Yes. SureCircle's real-time identity verification takes place on our mobile app, available on iOS and Android, so people can verify and be verified wherever they work.

Most teams can be up and running quickly. Exact timelines depend on the size of your organization and the scope of the rollout, which we will scope with you during onboarding.

SureMark is licensed on a per-seat basis for enterprise teams. Reach out for a quote tailored to the size and needs of your organization.

Contact us through the options below and we will set up a live demo and walk through deployment for your team.