About Us

In 2006 a team of Estonian cryptographers, network architects, software developers and security specialists got together to build a digital signature/timestamping infrastructure designed for massive scale authentication of  electronic data at rest. The team named their invention Keyless Signature Infrastructure (KSI), so called because the verification relies only on formal methods using hash functions, not cryptographic keys.

The Guardtime vision is a world where electronic data is more reliable than physical; where corrupt insiders, hackers or cybercriminals can’t manipulate data; where Governments and Enterprises give complete transparency to their stakeholders and where all the events on the world’s networked computers are linked together and verifiable independently from any human being.

As a company, Guardtime now has global reach, but the original R&D team is still located in Tallinn, Estonia, a whisker away from Skype’s main engineering office and close to both the NATO Cooperative Cyber Defence Centre and the European Union Information Technology Agency.

Guardtime has been recognized for its product innovation by many parties, some of our awards include: