---
title: "rgdd.se"
---
{{< figure class="avatar" src="img/author.jpg" alt="avatar">}}

Software engineer and computer scientist based in Karlstad, Sweden.  I do
open-source work at [Glasklar Teknik][], a sister company of [Mullvad VPN][] and
[Tillitis][].  Some of the topics I'm most passionate about include anonymity,
cryptography, Linux, privacy, Bash/C/Go programming, and transparency logs. The
last few years I got into self hosting.  The overlap between research,
development, and operations is interesting.

[Glasklar Teknik]: https://www.glasklarteknik.se/
[Mullvad VPN]: https://www.mullvad.net/
[Tillitis]: https://www.tillitis.se/

Off work you will find me socializing with friends, going on walks, hitting the
gym, improving my cooking skills, and showering my beloved cat with affection.

# Project involvement 

I am a core member of the following projects:

  - [Sigsum][]: a free and open source software project that makes a signer's
  key-usage transparent.  It can be used as a building block to secure the
  supply chain and more.
  - [System Transparency][]: an open source project that provides a security
  architecture for bare metal servers.  A system's entire boot chain becomes
  protected and auditable.
  - [Tor][]: a 501(c)(3) US nonprofit that advance human rights and defend online
  privacy through free software and open networks.

[Sigsum]: https://www.sigsum.org/
[System Transparency]: https://www.system-transparency.org/
[Tor]: https://www.torproject.org/

# Selected publications

  - Rasmus Dahlberg.
    [On Certificate Transparency Verification and Unlinkability of Websites Visited by Tor Users](https://www.diva-portal.org/smash/get/diva2:1751660/FULLTEXT02.pdf).
    PhD thesis, Karlstad University (2023)
  - Rasmus Dahlberg and Tobias Pulls.
  [Timeless Timing Attacks and Preload Defenses in Tor's DNS Cache](https://www.usenix.org/conference/usenixsecurity23/presentation/dahlberg).
  USENIX Security (2023)
  - Rasmus Dahlberg, Tobias Pulls, Tom Ritter, and Paul Syverson.
  [Privacy-Preserving \& Incrementally-Deployable Support for Certificate Transparency in Tor](https://petsymposium.org/2021/files/papers/issue2/popets-2021-0024.pdf).
  PETS (2021)
  - Tobias Pulls and Rasmus Dahlberg.
  [Website Fingerprinting with Website Oracles](https://petsymposium.org/2020/files/papers/issue1/popets-2020-0013.pdf).
  PETS (2020)
  - Tobias Pulls and Rasmus Dahlberg.
  [Steady: A Simple End-to-End Secure Logging System](https://eprint.iacr.org/2018/737.pdf).
  NordSec (2018)

# Contact

Feel free to reach out on email or other platforms as you see fit.