/now - What I'm doing now

Last update: 08 Apr 2026. This is a now page.

OpenSC and Lithuanian electronic identity card

Recently I’ve been toying with electronic signatures / authentication using electronic identity cards. Official Lithuanian government provided Linux software is not great, so I ended up writing OpenSC driver for it. Pull request is now merged and driver should be out with a next release of OpenSC.

GPS Time, HackRF One and signal recording

A slow moving project: TDOA experiment with multiple HackRF One SDR receivers synchronised using GPS 1PPS timing signal + GPS disciplined clock. Got 2x HackRF One receivers, 2x Leo Bodnar LBE-1421 GPSDOs, some other misc stuff.

Whole thing started after learning about Open Compute Time Card and 1ns precise timing from GPS.

And here’s my “I don’t have a lab - bedroom is my lab” set up with 2x HackRf One SDRs. For now I’m toying with recording two receivers side by side to see if I can cross correlate signals at all: