Tresorit is a cloud storage service with

end-to-end encryption End-to-end encryption (E2EE) is a system of communication where only the communicating users can read the messages. In principle, it prevents potential eavesdroppers – including telecommunications service providers, telecom providers, Internet ...

. Founded in 2011, Tresorit closed an €11.5M Series B financing round in 2018 and was featured on FT1000 by Financial Times 2020 as the fifth fastest-growing cybersecurity company in Europe. The software is available for

Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for ser ...

macOS macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac computers. Within the market of desktop and lapt ...

, Android,

iOS iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that powers many of the company's mobile devices, including the iPhone; the term also include ...

, and

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, w ...

, and the company has released plugins for Gmail and Outlook. As of 2022,

Swiss Post Swiss Post (french: La Poste suisse, it, La Posta Svizzera, german: Die Schweizerische Post, rm, La Posta Svizra) is the national postal service of Switzerland. A public company owned by the Swiss Confederation, it is the country's second lar ...

owns a majority stake in the cloud storage service. Tresorit works as an independent entity under

. The company has offices in Zurich, Switzerland; Munich, Germany; and Budapest, Hungary, employing around 100 people.

History

Tresorit was founded in 2011 by Istvan Lam (CEO), Szilveszter Szebeni (CIO) and Gyorgy Szilagyi (CPO). In the coming years, Andrea Skaliczki joined as CFO, Istvan Hartung as CTO and Arno van Züren as CSO. The company officially launched its client-side encrypted cloud storage service after emerging from its stealth beta version in April 2014. In 2013 and 2014, Tresorit hosted a hacking contest offering $10,000 to anyone who hacked their data encryption methods to gain access to their servers. After some months, the reward was increased to $25,000 and later to $50,000, challenging experts from institutions like Harvard, Stanford or

MIT The Massachusetts Institute of Technology (MIT) is a private land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the m ...

. The contest ran for 468 days and according to the company, nobody was able to break the encryption. In August 2015, Wuala (owned by LaCie and Seagate), a pioneer of secure cloud storage, announced it was closing its service after 7 years and recommended its users choose Tresorit as their secure cloud alternative. In 2016, Tresorit launched a beta of the software development kit (SDK) ZeroKit. In January 2017, Apple's SDK project CareKit announced the option for mobile app developers using CareKit to integrate ZeroKit, enabling zero-knowledge user authentication and encryption for medical and health apps. In 2017, Tresorit patented its shareable encryption technology in the US under no. US 9563783 B2, and

LogMeIn GoTo, formerly LogMeIn Inc., is a flexible-work provider of software as a service (SaaS) and cloud-based remote work tools for collaboration and IT management, with products including GoTo Connect, GoTo Resolve, Rescue, Central, and more, built ...

co-founder Marton Anka joined Tresorit as an investor and advisor. In 2019, Tresorit reached the number of 100 employees, and Tresorit improved its governance feature set with e-mail verification and detailed user reports. In July 2021, Tresorit was acquired by the

to further expand its presence in its core German-speaking markets, including

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

, and Switzerland.

Technology

Tresorit uses

AES 256 The Advanced Encryption Standard (AES), also known by its original name Rijndael (), is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001. AES is a variant ...

encryption. With Tresorit's

, every file and relevant metadata on user devices are encrypted with unique, randomly generated encryption keys. These keys are never sent to Tresorit's servers in an unencrypted format. Accessing files is only possible with a user's unique private decryption key. Tresorit uses random keys for each file and random IVs for each version of a file. The company claims that two identical files look completely different after encryption, thus they cannot be compared or matched. Due to its zero-knowledge system, Tresorit does not store passwords, only the user can access his/her own password. Administrators of a business Tresorit account can reset passwords in exceptional cases but can never access those.

Awards

In 2017, Tresorit was named one of the Rising Stars at

Deloitte Deloitte Touche Tohmatsu Limited (), commonly referred to as Deloitte, is an international professional services network headquartered in London, England. Deloitte is the largest professional services network by revenue and number of professio ...

's Technology Fast 50 Central Europe Award. In 2019, Tresorit was named as a Global Leader in Cloud Computing at the Stratus Awards. In 2020, Tresorit was named a 2020 Gartner Peer Insights Customers' Choice for Content Collaboration Tools and was featured on FT1000 by

Financial Times The ''Financial Times'' (''FT'') is a British daily newspaper printed in broadsheet and published digitally that focuses on business and economic current affairs. Based in London, England, the paper is owned by a Japanese holding company, Ni ...

2020 as the fifth fastest-growing cybersecurity company in Europe.

References

{{File hosting service File sharing services Cloud storage Cloud applications Online backup services Data synchronization Email attachment replacements File hosting File hosting for macOS File hosting for Windows File hosting for Linux MacOS software Linux software Cryptographic software Productivity software Companies' terms of service

History

Technology

Awards

See also

References