Sander
sanderdijkhuis.nl
Sander
@sanderdijkhuis.nl
How to introduce new formats to exchange structured data? Wrap them in PDF. An interactive demo: preludes.eu/op/2025/ii/
Portable documents host new file formats | Digital Preludes
preludes.eu
November 10, 2025 at 10:43 PM
Renaissance attitude in software preludes.eu/2025/areal-t...
Introducing Areal, Are.na’s New Typeface | Digital Preludes
preludes.eu
September 25, 2025 at 6:20 AM
This year’s eSIM hack demonstrates how threat models need to evolve. The vulnerability was well known for decades, but it took time to become relevant. preludes.eu/2025/bytecod...
Java Card++ ? | Digital Preludes
preludes.eu
August 31, 2025 at 1:56 PM
Understanding #DigitalIdentity standards is not easy, but even harder if the originals are expensive to obtain. Especially the ISO/IEC ones. This is getting better preludes.eu/2025/free-hs...
Free access to cryptographic module requirements | Digital Preludes
preludes.eu
August 31, 2025 at 1:42 PM
I’m intrigued by the @trbouma.bsky.social newsletter series on verifiable, portable digital accounts preludes.eu/2025/verify-...
It’s Not About Credentials, It’s About Records | Digital Preludes
preludes.eu
August 31, 2025 at 1:39 PM
After @writer.ia.net and @presenter.ia.net, I can’t wait to install iA Computer.
August 31, 2025 at 1:27 PM
Credential is my new favourite polyseme in #DigitalIdentity. Sometimes it means data to present yourself as a digital entity, other times the document to exchange identity attributes between those digital entities.

Reflect in preludes.eu/op/2025/i/ on different treatments in standards and systems.
August 24, 2025 at 3:59 PM
Starting a blog on designing for digital identity: preludes.eu – would love your feedback and prompts.
Digital Preludes
preludes.eu
August 23, 2025 at 1:24 PM
New EU agreed cryptography: certification.enisa.europa.eu/publications... Replaces the SOG-IS docs. Still no Edwards curves, but we can now build and certify with PQC.
EUCC Guidelines on Cryptography
EUCC Guidelines Cryptography
certification.enisa.europa.eu
May 7, 2025 at 8:49 PM
Most APIs complect message delivery with business domain semantics. It’s an easy way to connect internal business applications mutually and to contracted infrastructure platforms. But to connect many-to-many people and organisations, we need something simpler.
May 2, 2025 at 8:28 AM
Time to dive into the AT Protocol. Curious how Decentralized Identifiers complement human-readable Handles, and how this compares to Mastodon’s federation design. https://atproto.com/docs
Docs | AT Protocol
A social networking technology created by Bluesky.
atproto.com
August 1, 2023 at 12:25 PM
Hello World! And thank you @abbatykori.com for the invite 🙏
August 1, 2023 at 11:40 AM