Author Sieuwert van Otterloo
Dr. Sieuwert van Otterloo is a court-certified IT expert with interests in agile, security, software research and IT-contracts.
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
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
ITIL and service management: a short introduction
ITIL, the standard for service management, is an important standard for people who want to understand how IT is used in practice. It is especially important for professionals that want to grow beyond software development into IT management, since it complements software development really well.
Sieuwert van Otterloo
open standard Security Verified updated
Last month (feb 2024), the 2024 version of the open information security standard ‘Security Verified’ was released. This new version contains small changes to make it more readable and easier to combine with the latest version of ISO 27001.
Sieuwert van Otterloo