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Originally working on a YubiKey support for Crypt4GH stream processing library turned out to become a work to fully support GnuPG at least on UNIX platforms. In recent GnuPG versions everything is handled by gpg-agent but an interesting problem arose - how to find its socket when using alternative GnuPG homedir?

Analyzing cryptographic systems usage with respect to how the users interact with it sometimes requires programmatically simulating their actions. It is no different with our recent work on rclone cryptographic keys handling. However we are lucky that Racket provides all the functionality we needed!

Faced with the requirement of computing symmetric key from the result of Elliptic-Curve Diffie-Hellman key exchange according to a specification, the primary ingredient for such calculation is the result itself. Read on to see how Interesting things you may find if you need to use YubiKey's OpenPGP Card application as a foundational component of any solution.

As has been announced earlier, I had the opportunity to talk about recent rclone developments at the LinuxDays conference. Although the talk started at 10AM, the auditorium was crowded and it turns out many people were actually very interested how it is possible to ensure decent confidentiality when using public cloud object storage services!

As we have already revealed, we use Punct to produce our new website. Punct is extending CommonMark with metadata and uses Racket racket-commonmark. Sometimes there are problems with software, but usually those can be solved - as happened in this case. And with a new release, new features arrived as well.