How to Build Digital Signatures From Hash Functions - Ahto Truu [ ACCU 2021 ] 

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Slides: accu.org/conf-previous/2021/s...
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In modern societies, more and more paper documents and ink signatures are replaced with their electronic equivalents. Now the ascent of quantum computing threatens to render all current digital signature systems insecure. Hash functions, however, seem to be quite resilient to quantum attacks and thus a promising building block for future cryptographic protocols.
The talk will recap the essentials of the existing digital signature systems as well as cryptographic hash functions and then show how the former can be built from the latter. Curiously enough, a digital signature system based on hash functions was one of the first to be invented when the idea of asymmetric cryptography was introduced to the world!
In addition to reviewing the most important historical systems, the talk will also cover a brand new one developed over the past few years.
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Ahto Truu
During his two and a half decades in the ICT industry, Ahto has worked in hardware installations and user support, as a software developer and architect, and as a systems analyst. Currently he is busy helping Guardtime's customers preserve the integrity of their important data. Outside his day job he coaches Estonia's team to the high school students' programming competitions. He has also been writing programming columns for the popular science magazines A&A and Horisont.
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Future Conferences:
ACCU 2022 Spring Conference, Bristol (UK), Marriott City Centre:
2022-04-05 to 2022-04-09.
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