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sphincs sphincs stateless hash based signatures home resources software credits sphincs sphincs is a stateless hash based signature scheme which was submitted to the nist post quantum crypto project the design advances the sphincs signature scheme which was presented at eurocrypt 2015 it incorporates multiple improvements specifically aimed at reducing signature size for a quick overview of the changes from sphincs to sphincs see the blog post by andreas hülsing the submission proposes three different signature schemes sphincs shake256 sphincs sha 256 sphincs haraka these signature schemes are obtained by instantiating the sphincs construction with shake256 sha 256 and haraka respectively the second round submission of sphincs introduces a split of the above three signature schemes into a simple and a robust variant for each choice of hash function the robust variant is exactly the sphincs version from the first round submission and comes with all the conservative security guarantees given before the simple variants are pure random oracle instantiations these instantiations achieve about a factor three speed up compared to the robust counterparts this comes at the cost of a purely heuristic security argument news 2020 10 28 third round submission added to website 2019 09 23 the sphincs team published two papers to appear at this years ccs and asiacrypt the first paper introduces decisional second preimage resistance dspr dspr is a new concept that allows to remove a statistical assumption on the used hash function which was previously required to achieve a tight security reduction for sphincs the second paper gives a new tight security proof for sphincs using dspr introduces the abstraction of tweakable hash functions and compares sphincs to other symmetric cryptography based signature schemes 2019 06 25 second round submission added to website 2017 12 19 sphincs website is online 2017 12 04 blog post summarizing the design of sphincs 2017 11 30 sphincs proposal submitted to the nist pqc project sphincs team leader and primary submitter andreas hülsing eindhoven university of technology nl sandboxaq us sphincs team jean philippe aumasson daniel j bernstein university of illinois at chicago us and ruhr university bochum de and academia sinica tw ward beullens ibm research europe zurich ch christoph dobraunig graz university of technology at maria eichlseder graz university of technology at scott fluhrer stefan lukas gazdag genua gmbh andreas hülsing eindhoven university of technology nl sandboxaq us panos kampanakis aws stefan kölbl google ch mikhail kudinov eindhoven university of technology nl tanja lange eindhoven university of technology nl and academia sinica tw martin m lauridsen florian mendel infineon technologies de ruben niederhagen academia sinica tw university of southern denmark dk christian rechberger graz university of technology at joost rijneveld radboud university nl peter schwabe mpi sp radboud university nl bas westerbaan cloudflare contact contact sphincs org design 2017 by peter schwabe last updated mon 12 aug 2024 19 53 28 gmt title photo by bernd thaller modified cc by 2 0