1. My PA0FRI Active Antenna

    Sat 08 February 2025 By Dhiru Kholia

    My homebrewed PA0FRI Active Antenna seems to be working well from a very physically constrained location.

    3D render:

    PA0FRI Active Antenna Render

    Schematic:

    PA0FRI Active Antenna Schematic

    Results:

    PA0FRI Active Antenna Results

    The antenna is connected to a RSP1 Clone SDR which is running custom FT8-band-hopping software. I am using a SOLID 4-Way 5-2400 MHz RF splitter to connect multiple SDRs to …

    read more
  2. Easy Taint Tracking (Finding Heartbleed)

    Fri 01 November 2024 By Dhiru Kholia

    Aim

    Finding 'Heartbleed' class of bugs with taint analysis.

    Background reading: https://heartbleed.com/

    Motivation

    While Coverity is now able to detect this bug, we wanted to evaluate the state of open-source security tooling in 2024.

    Have we been able to reduce the cost of finding such bugs after all …

    read more

« Page 2 / 2