What to find here

This is my private web site. It offers documents and software for download which I've created and which I think might be interesting or useful to others:

• duhg: updating DDNS entries from a UNIX system
• TeX macros
• A CRT monitor capability diagram
• Coordination Primitives for Thread-Safe Operations (PDF file)
• Message Passing Between Loosely-Coupled Threads by Means of Flexible Ring Buffers (PDF file)
• Deficiencies of the programming rules issued by the German railway authority (EBA) (PDF file; in German)
• Safety and Authentication (PDF file)
• Documents on the general theory of relativity
• My ancestors

Legal Matters

External Links

This web site contains hyperlinks to external web pages. These links do not imply any assertions about the referenced page except that I found it interesting or useful at the time I created the link.

If you discover a legal problem with any of the external links, please contact me through the address listed below.

Copyright and License

As far as I am the only author of the files on this web site (web pages as well as the other files referenced through hyperlinks) and if the file in question is not covered by other rules (e.g., in the file itself or, in case of a file from a package, in that package's documentation), the following applies:

• Programs and similar files (i.e., files executable on a computer and their source code) may be used according to the GNU General Public License, version 2.
• All other files are available under the terms of the Create Commons license Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0).

The same rules are meant to apply to my share in files on this site where other people have also rights.

Contact Information

My OpenPGP key (short ID B8322227) can be found here. The fingerprint is EEF0 BC10 C215 3CE4 24F2 0553 CD15 3391 B832 2227. Signatures created before October 2011 use my OpenPGP key of 1999 (short ID 07E691F3); its fingerprint is 17F2 363E 6F2C 813B C6DC 78E5 B9ED 32D5 07E6 91F3.

If you prefer PKIX-based cryptography, you can find a certificate for my current key here, together with the root certificate
(SHA-1 digest: C2:E5:7F:6B:5E:B6:69:73:12:94:1C:4E:D0:4C:38:A9:63:3F:54:55, for the key with ID 21:15:DE:FC:89:EF:98:8A:7A:56:C0:8F:8E:45:3A:62:D4:D1:F0:41) of my private certification authority (CA).