Skip to content
Marcel Waldvogel

Netfuture: The future is networked

  • Blog
    • Blog
    • Blockchain critique
  • Publications
  • Open Source Software
    • TLS Interposer
    • Automatic SOGo configuration for iOS (iPhone/iPad) and MacOSX
    • vcard4-ts: vCard version 4 parsing, TypeScript-style
    • fake-super: Recover rsync attributes
    • dnstemple: DNS with Templates
  • Tutorials
    • Tutorial: Cyclic Redundancy Check (CRC) Computation
      • Background: Asynchronous Serial Communications (RS-232C)
      • Parity Bits
      • Checksums
      • Intermission: Classes of errors
      • Check Digits
      • Error Correction Codes (ECC)
      • Cyclic Redundancy Check sequences (CRC): A Big Mystery?
      • CRC Hardware Operation
      • Software CRC Computation
      • Mathematical Background
      • Polynomial view
  • About
    • Deutsch
    • English
  • Configuring an NTS-capable NTP server

    Configuring an NTS-capable NTP server

    The choice of Network Time Protocol (NTP) servers supporting NTS is still very limited. Here is some advice to get it to run smooth and trustworty.

    2022-01-01
  • Transparent, Trustworthy Time with NTP and NTS

    Transparent, Trustworthy Time with NTP and NTS

    «Time is Money», as the old adage says. Who controls the time, controls all kinds of operations and businesses around the world. And therefore, controls the world. Today, we all take accurate time for granted. Even though, today, it is delivered over the Internet mostly unsecured. But this is easy to change.

    2021-12-26
  • Array Thickening: More can be less

    Array Thickening: More can be less

    When turning flexible file formats into data structures, the consensus seems to be to avoid using arrays whenever possible. However, more arrays may reduce code and coding errors. A plea against the extinction of arrays.

    2021-11-06
  • vcard4-ts: A TypeScript-first vCard parser

    vcard4-ts: A TypeScript-first vCard parser

    TypeScript is the amiable and helpful sibling of JavaScript, always there for you, whether you currently do want type safety or you don’t. So it was only natural to use it to make handling digital business cards easier. vCard4-ts is the result of this attempt.

    2021-11-05
  • CompanyON: Serving as gutSTEIN

    CompanyON: Serving as gutSTEIN

    Our gift card solution for regional brick-and-mortar stores and restaurants has been successfully used in Stein am Rhein for almost a year. As of today, the local version of our gift card for Stein am Rhein, provided by the regional business association, also has a local name: gutSTEIN. The card has become an important asset…

    2021-09-20
  • Contact Tracing — Quo Vadis?

    Contact Tracing — Quo Vadis?

    How much we are all looking forward to returning to normal lives: Meeting friends, hugging family, a cool beer, culture. After more than a year, we really deserve it! However, there are still roadblocks in the form of a bloody virus and the countermeasures. Anyone promising a quick end is hailed as a saviour. (This…

    2021-04-17
  • Electronic Vaccination Certificate: Eureka! Eureka?

    Electronic Vaccination Certificate: Eureka! Eureka?

    When I was reading the original “Spiegel” article on the German Electronic Vaccination Certificate, I was fascinated.

    2021-03-12
  • Generating Multi-Architecture Docker Images Made Easy

    Generating Multi-Architecture Docker Images Made Easy

    Docker is cool and portable, but distributing Dockerfiles comes at a disadvantage: The demands on the build environment are high. Distributing Docker images solves this, but building them for an architecture other than your CPU architecture seems complicated. Here is a simple solution.

    2020-05-13
  • HomeCA: Scalable Secure IoT Network Integration

    HomeCA: Scalable Secure IoT Network Integration

    2019-09-25
  • A brief history of time(stamping)

    A brief history of time(stamping)

    When I tell people about timestamping, they often react with, “Ah, yes, that Blockchain thing”. However, timestamping is as old as civilisation and has some interesting properties it gains from non-Blockchain applications. So let’s go back a few millenia first.

    2019-03-29
←Previous Page
1 … 3 4 5 6 7 … 22
Next Page→

Content on this site is licensed under CC-BY-4.0 unless otherwise noted. Some image creation has been assisted by AI, especially the weird-looking teasers.