Secure your data
with the noise around you

Our Authentication Products


  • Easy, fast and strong authentication for end-users
  • Zero interaction required from the end-user at the time of login
  • According to surveys, the 2FA solution that end-users want

Learn more


  • The next generation of access management
  • Terminates the active session when the end-user leaves the computer
  • Pre-emptively blocks unauthorized access to resources


  • Early identification of high-risk login attempts and tailor login requirements
  • Enhance risk-based authentication settings
  • Make it even simpler for end-users but impossible for the intruders to access data

The Sound-Proof authentication products do not require interaction between the user and the phone.

Sound-Proof checks the proximity of the user’s phone to the device being used to log in. The proximity of the two devices is verified by our AI-enhanced algorithms that compare the ambient noise recorded by their microphones. Audio recording and comparison are fast and invisible to the end-user. Sound-Proof can be easily deployed as it works with major browsers (Chrome, Firefox, Opera, Edge) without plugins.

About us

Sound-Proof was created by people from ETH Zurich, Switzerland.

Claudio Marforio
Dr. Claudio Marforio
CEO & Co-Founder

Claudio holds a PhD from ETH Zurich. He focused his research on security of mobile devices (ARM TrustZone, usable security, kernel programming, application attacks) with publications in top-tier international conferences. He focuses on strategy and business development.

Nikolaos Karapanos
Nikolaos Karapanos

Nikos is a PhD student at ETH Zurich. He focuses his research on web authentication. Nikos has years of experience in developing mobile and web applications and a deep understanding of the research aspects of Sound-Proof.

Mike Resvanis
Mike Resvanis
Lead Developer

Mike is our lead developer for both back-end and mobile applications (iOS and Android). He has years of experience in both startup and corporate environments.

Srdjan Capkun
Prof. Srdjan Capkun

Srdjan is a Full Professor at ETH Zurich, where he leads the System Security Group and he is also the Director of the Zurich Information Security Center.



Danger is no real danger

Long story short: Sound-Proof is secure! The attacks recently published in “The Sound of the Phones” have all been mitigated by our latest implementation.

Read more →

Sound-Proof Demo for Android Available

We are happy to announce that the Sound-Proof demo is available also for Android. Anyone can now register on our demo page.

Read more →

Sound-Proof at CeBIT

Nikos presented Sound-Proof at the Swiss Arena at CeBIT in Hannover. You can watch the video of the presentation (~130MB)

Read more →

All News

Stay up to date!

Subscribe to our newsletter to stay on top of new developments.