I don't use web-forms, social network interactions or mobile device messaging apps; you are invited to contact me by e-mail at the address above. The mailbox is checked frequently, but the address may occasionally change. However, before sending any message, please consider the following:I do not use e-mail communication unless it is OpenPGP signed and encrypted. Non-encrypted messages are rejected before the recipient has had an opportunity to read the content. Please avoid HTML formatted mail - for security reasons, my mail program is configured to remove all HTML ornamentation as well as any "external content". Please do not send attachments; if there is an absolute necessity to do so, let me know before you send a message with one. Never quote the complete text of previously sent or received messages in your replies; such messages are also likely to be rejected by my somewhat strict spam filtering.
The public key for the address above is available via WKD protocol, from keys.openpgp.org and (in form of an ascii text file) on this web-page. The key fingerprint is f349cb82 6f47299e ce8c2bfc 70b80579 9fc3a661. (Comparing the key fingerprint listed here with the value that is reported/returned by keys.openpgp.org server and/or obtained via WKD, and both (or all three) with the fingerprint reported by your mail client program after the key has been imported is more than adequate verification of the key authenticity).
Those new to OpenPGP e-mail encryption might consider Proton.me; the only free web‑mail service providing a limited level of OpenPGP inter‑operability.
Contact in case of personal emergencies.
Reference information related to Geodyssey Limited and Hipparchus Library.
Collection of Hipparchus Geopositioning System related papers.
A Modest Proposal for a better planetary coordinate system.
What next: Nemo Library.
The story of Point Nemo and other trivia (an interview).
Point Nemo, 20 years later (Point Nemo, revisited).
An annotated collection of links to information security and privacy resources.
Miscellany:
The Children of Sana'a
PDS Velebit
Calamus Gladio Fortior