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About Kristof Verslype

Kristof obtained a PhD in engineering sciences at the KU Leuven with research on cryptographic protection of privacy with zero-knowledge proofs. In this context, he won the best paper award at the International Conference on Security and Cryptography (SECRYPT). In 2011, he joined the research department of Smals, an IT service provider for the Belgian public sector. His current domains are privacy-enhancing technologies, post-quantum cryptography, crypto-agility and advanced identifier pseudonymisation. Kristof frequently gives talks about these topics and is author of several books on blockchain. In 2024, he was nominated for the Privacy Professional Award by Belgium's Cyber Security Coalition. In 2025 the Blinded Pseudonymization Service he co-developed for Belgium’s eHealth-platform received the runner-up (2nd) Award issued by Cybersec Europe for Best Cybersecurity Innovation Europe.

Interests: Privacy, security, applied cryptography, distributed trust, blockchain, smart contracts

Email: kristof.verslypeblah [at] blah blahsmals.be

List of documents :

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List of blog posts :

Linking Together Personal Data in the Era of Big Data & GDPR

In May 2018, the much-discussed GDPR will be enacted. Besides identified data and anonymous data, the European regulation introduces a new category of data, called pseudonymous data. This articles presents an approach, based on cryptographic pseudonyms, that can help governments to … Continue reading

Bitcoin – Van Experiment tot Ecologische Ramp

Op 22 mei 2010 kocht een software ontwikkelaar 2 pizza’s voor 10 000 bitcoins. Vandaag zijn 10 000 bitcoins ongeveer 40 miljoen dollar waard. Die astronomische stijging spreekt tot de verbeelding. Toch heeft dit succesverhaal een nauwelijks belichte keerzijde. De … Continue reading

Open en minder open blockchain netwerken

Blockchain zag in 2009 het licht met de lancering van Bitcoin. Het Bitcoin netwerk is extreem open en transparant; iedereen kan minen1, iedereen kan transacties publiceren en iedereen kan de volledige inhoud van de blockchain zien. Daarenboven kan iedereen wereldwijd … Continue reading

Keyless Signature Infrastructure (KSI) – Een alternatief op PKI voor digitale handtekeningen?

Een public key infrastructure, of kortweg PKI, wordt algemeen gezien als de enige manier om digitale handtekeningen te plaatsen. Toch heeft Estland al acht jaar een alternatief dat luistert naar de naam Keyless Signature Infrastructure, of kortweg KSI. Hoe werkt … Continue reading