Skip to main content
invest in estonia


How the Estonian company Sentinel is fighting a war of AI-s

Digital technology has brought incredible opportunities for bettering the human condition but also poses new kinds of challenges for our society. An Estonian company Sentinel is at the forefront of fighting the war of AI-s.

“Post-truth” was named Word of the Year by Oxford Dictionaries in 2016. Fighting deception and lies and establishing trust in information is a significant task for Western countries. Why? Because trust and truth are the pillars of democracy. Without them, democracy will fail.

AI-s fighting each other

Sentinel is engaging the most complex forms of deception: deepfakes. Prefix “deep” signifies concepts that go beyond the human plane. Thus, deepfakes are video imagery created by AIs, better of which are indistinguishable from real ones. They differ from conventional digital forgery by also escaping detection by humans. Therefore, Sentinel is relying on its AI to detect forged videos. And hence we witness the arrival of a new form of warfare: AI-s fighting each other in the digital realm.

Over 100M deepfakes

Sentinel has just closed a 1.35M $ seed round and joined the arms race in deepfake detection. Because the technology is advancing at an incredible speed, the race is aiming at moving targets. Since 2019, the number of deepfakes online has grown 900% and passed 100M. Advancements have driven this exponential growth in AI algorithms, lower cost of computing, and exponential growth of data on the Internet. Therefore Sentinel, unlike its competitors Microsoft and Deeptrace, is using multiple layers of defense instead of one single neural network.

Four layers of defence

“We think it is impossible to detect all deepfakes with only one detection method,” Sentinel co-founder and CEO Johannes Tammekänd tells. “We have multiple layers of defence that if one layer gets breached, then there’s a high probability that the adversary will get detected in the next layer.”

At the current stage, Sentinel is lining up four layers: an initial layer based on hashing known examples of deepfakes to check against; a second layer comprised of a machine learning model that parses metadata for manipulation; a third that checks for audio changes, looking for synthesized voices; and lastly a technology that analyzes faces “frame by frame” to look for signs of visual manipulation. Based on these layers, a „certainty score“ is assigned to the video.

“This indicates that we have already reached the point where we cannot say with 100% certainty if a video is a deepfake or not unless the video is “cryptographically” verifiable, “ Mr. Tammekänd explains.

Founders used to work for NATO and the Royal Navy

Because the stakes in digital security are high (think the coming US elections, for example), Sentinel, whose founders include ex NATO and the U.K. Royal Navy employees, choose their clients carefully. They recently turned down requests from Saudi Arabia and China and work only with NATO allies.

There are likely significantly more AI-generated media in the future so that instead of just one video whole plethora of synthesized media is created reflecting complete fake events. Furthermore, this fake content is hyper-personified based on the data we leave in the cyberspace to be even more susceptible to believe this. This type of disinformation could influence the fate of whole countries and markets.

Estonia’s unique position

Therefore Mr. Tammekänd’s vision for the next decade is to provide authentication solutions scaled up to possibly all Internet users. Estonia has a unique position for this kind of service because, for Estonians, the ID card mandatory for all citizens offers digital signing and encryption already now. This, Mr. Tammekänd sees, could be the foundation upon which to extrapolate. Similarly to fighting against computer viruses, authentication software will evolve on two tiers: certification by creators and detection by users. Thus, when the first clients for Sentinel’s products are states, commercial actors will soon follow. And very shortly, these defensive AI-s will become familiar allies for each Internet user as antivirus software is today.


Interested in IT R&D opportunities in Estonia? Read more here or send us a request for e-Consulting.

See the original article here.

News & events

Need more information?

Need more information?

What is it like to run a business in Estonia? How to benefit from the e-solutions and the efficiency of our business culture? What are the opportunities in specific sectors? Who to partner up with?

The Estonian Investment Agency’s team is happy to help you via its complimentary e-Consulting service, organize online or offline follow-up events such as virtual investment visits and guide you through the fairly simple process of investing in Estonia.

Request e-consulting