Blog
Sieuwert Explains – Free Youtube Channel
We have started a Youtube channel called “SieuwertExplains” with short instruction videos on IT standards and compliance topics. It is intended as a free learning resource for people that want to improve their knowledge. The channel can be found here: https://www.youtube.com/@sieuwertexplains The ISO 27001 series On the channel we will make a series on ISO…
Sieuwert van Otterloo
Training implementing ISO 27001 with certificate
If you work in a security team that uses the standard ISO 27001, it is useful to complete a formal ISO 27001 training so that you use the standard correctly. We are now offering a short course that covers the fundamentals of information security based on ISO 27001.
Sieuwert van Otterloo
The Utrecht Housing dataset: A housing appraisal dataset
Van Otterloo, S and Burda, P. 2025. The Utrecht Housing dataset: A housing appraisal dataset. Computers and Society Research Journal (2025), 1 DOI: https://doi.org/10.54822/QVHM1662 Abstract This paper introduces a real-world dataset for analysing and predicting house prices. The dataset consists of actual data on the Dutch housing market collected in 2024 for a total of 153…
Sieuwert van Otterloo
AI audits
Companies making or using high risk AI systems must do AI audits and assessments to comply with the AI Act. We do these audits in a practical constructive manner, based on our technical and legal experience.
Sieuwert van Otterloo
ISO 27001 technological controls for software development
The latest version of ISO 27001 contains multiple controls about secure development, engineering, coding and testing that seem to overlap. In this article we provide guidance how to implement these controls. The overlapping controls explained are 8.25, 8.26, 8.27 and 8.28. We also cover 8.31 and 8.33 (test environments and test information).
Sieuwert van Otterloo