Publications


Below you can find a selection of academic papers about Guardtime's technology.

On Provably Secure Time-Stamping Schemes

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Ahto Buldas, Märt Saarepera

In: Pil Joong Lee. Advances in Cryptology - ASIACRYPT 2004, 10th International Conference on the Theory and Application of Cryptology and Information Security, Proceedings. LNCS 3329, pp. 500-514. Springer, 2004.

Optimally Tight Security Proofs for Hash-Then-Publish Time-Stamping.

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Ahto Buldas, Margus Niitsoo

In: Ron Steinfeld, Philip Hawkes. Information Security and Privacy - 15th Australasian Conference, ACISP 2010, Proceedings. LNCS 6168, pp. 318-335. Springer, 2010.

Security Proofs for Hash-Tree Time-Stamping Using Hash Functions with Small Output Size

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Ahto Buldas, Risto Laanoja

In: Colin Boyd, Leonie Simpson. Information Security and Privacy - 18th Australasian Conference, ACISP 2013, Proceedings. LNCS 7959, pp. 235-250. Springer, 2013.

Bounded Pre-Image Awareness and the Security of Hash-Tree Keyless Signatures

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Ahto Buldas, Risto Laanoja, Peeter Laud, Ahto Truu

In: Sherman S. M. Chow, Joseph K. Liu, Lucas Chi Kwong Hui, Siu-Ming Yiu. Provable Security - 8th International Conference, ProvSec 2014, Proceedings. LNCS 8782, pp. 130-145. Springer, 2014.

Keyless Signatures' Infrastructure: How to Build Global Distributed Hash-Trees

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Ahto Buldas, Andres Kroonmaa, Risto Laanoja

In: Hanne Riis Nielson, Dieter Gollmann. Secure IT Systems - 18th Nordic Conference, NordSec 2013, Proceedings. LNCS 8208, pp 313-320. Springer, 2013.

Efficient Record-Level Keyless Signatures for Audit Logs

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Ahto Buldas, Ahto Truu, Risto Laanoja, Rainer Gerhards

In: Karin Bernsmed, Simone Fischer-Hübner. Secure IT Systems - 19th Nordic Conference, NordSec 2014, Proceedings. LNCS 8788, pp. 149-164. Springer, 2014.

Keyless Signature Infrastructure and PKI: Hash-Tree Signatures in Pre- and Post-Quantum World

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Ahto Buldas, Risto Laanoja, Ahto Truu

In: International Journal of Services Technology and Management, Vol. 23, Nos. 1/2, pp. 117-130. Inderscience publishers: 2017.

A Server-Assisted Hash-Based Signature Scheme

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Ahto Buldas, Risto Laanoja, Ahto Truu

In: Helger Lipmaa, Aikaterini Mitrokotsa, Raimundas Matulevičius. Secure IT Systems - 22nd Nordic Conference, NordSec 2017, Proceedings. LNCS 10674, pp. 3-17. Springer, 2017.

A Blockchain-Assisted Hash-Based Signature Scheme

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Ahto Buldas, Risto Laanoja, Ahto Truu

In: Nils Gruschka. Secure IT Systems - 23rd Nordic Conference, NordSec 2018, Proceedings. LNCS 11252, pp. 138-153. Springer, 2018.

Universally Composable Time-Stamping Schemes with Audit

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Ahto Buldas, Peeter Laud, Mart Saarepera, Jan Willemson

In: Lecture Notes in Computer Science. 3650: 359–373, 2005.

Knowledge-Binding Commitments with Applications in Time-Stamping

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Ahto Buldas, Sven Laur

In: Lecture Notes in Computer Science. 4450: 150–165, 2005.

Do Broken Hash Functions Affect the Security of Time-Stamping Schemes?

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Ahto Buldas, Sven Laur

In: Lecture Notes in Computer Science. 3989: 50–65, 2006.

Does Secure Time-Stamping Imply Collision-Free Hash Functions?

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Ahto Buldas, Aivo Jürgenson

In: Lecture Notes in Computer Science. 4784: 138–150, 2007.

MDA Approach for Maintenance of Business Applications

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Mila Keren, Andrei Kirshin, Julia Rubin, Ahto Truu

In: Arend Rensink, Jos Warmer. Model Driven Architecture - Foundations and Applications, Second European Conference, ECMDA-FA 2006, Proceedings. LNCS 4066, pp. 40-51. Springer, 2006.

On Using Testing-Related Tasks in the IOI

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Ahto Truu, Heno Ivanov

In: Olympiads in Informatics. Vol 2, pp. 171-180. Institute of Mathematics and Informatics, Vilnius, Lithuania, 2008.

Baltic Olympiads in Informatics: Challenges for Training Together

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Timo Poranen, Valentina Dagiene, Åsmund Eldhuset, Heikki Hyyrö, Marcin Kubica, Antti Laaksonen, Martins Opmanis, Wolfgang Pohl, Jurate Skupiene, Pär Söderhjelm, Ahto Truu

In: Olympiads in Informatics. Vol 3, pp. 112-131. Institute of Mathematics and Informatics, Vilnius, Lithuania, 2009.