Leon Derczynski's Avatar

Leon Derczynski

@leonderczynski.bsky.social

LLM Security at NVIDIA Prof in CS/NLP at IT University of Copenhagen garak guy, garak.ai "berømt skikkelse" "like a gazelle" Copenhagen/Seattle

703 Followers  |  367 Following  |  169 Posts  |  Joined: 20.11.2024  |  1.892

Latest posts by leonderczynski.bsky.social on Bluesky

Reminds me, I should back up my dropbox

13.12.2025 07:41 — 👍 1    🔁 0    💬 0    📌 0

huh, Harry Kim getting beaten up by Lyta Alexander was not on my background TV bingo card for today, but here we are

18.11.2025 13:16 — 👍 2    🔁 0    💬 0    📌 0

surprised (and grateful) I somehow still remembered on the first try the arcane incantation for quitting a telnet session. vi has nothing on this imo. muscle memory is weird

16.11.2025 19:58 — 👍 2    🔁 0    💬 0    📌 0

getting on arXiv isn't "being published"

03.11.2025 05:54 — 👍 0    🔁 0    💬 1    📌 0

come in, it definitely won't, arXiv is still the open door/no bar venue

03.11.2025 05:54 — 👍 1    🔁 0    💬 1    📌 0

😂 arXiv is cute when it pretends to have standards!

03.11.2025 05:53 — 👍 4    🔁 0    💬 0    📌 0

what thing

08.08.2025 04:37 — 👍 2    🔁 0    💬 1    📌 0
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Come to LLMSEC at ACL & hear Niloofar's keynote

"What does it mean for agentic AI to preserve privacy?" - Niloofar Mireshghallah, Meta/CMU

(Friday 1st Aug, 11.00; Austria Center Vienna Hall B)

See you there!

#acl2025 #acl2025nlp

28.07.2025 15:19 — 👍 12    🔁 2    💬 1    📌 0

the "oyster tower" bit was great. brutal

24.07.2025 09:28 — 👍 1    🔁 0    💬 1    📌 0

Or he's pushing a product into which x sunk significant capex?

11.07.2025 06:36 — 👍 0    🔁 0    💬 0    📌 0
have the courage to use your own intelligence

have the courage to use your own intelligence

logging on

10.07.2025 11:34 — 👍 153    🔁 29    💬 1    📌 1

Brazen of them. Sounds extremely awkward for you, I'm sorry. What would they have done with unaltered slides? Cancelled and left a gap in their schedule for no doubt paying participants?

08.07.2025 12:44 — 👍 4    🔁 0    💬 0    📌 0
Preview
Release v0.12.0 · NVIDIA/garak What's Changed New plugins Add audio NIM model and audio probes by @erickgalinkin in #1163 Leakreplay refactor by @dchiitmalla in #1264 probes: refactor fact snippet mixin by @leondz in #1187 New...

new garak, llm vuln scanner rls (v0.12.0)

* Audio attacks, for multimodal models
* More training data membership inference attacks
* Multilingual attacks can now also use GCP
* Detailed eval summary in one JSONL row/object

+more :)

details: github.com/NVIDIA/garak...

02.07.2025 15:32 — 👍 1    🔁 0    💬 0    📌 0

the dying but clinging on battery in the bathroom's Frozen-branded soap dispenser reminds me that it's only 4-5 months til Bublé & Let It Go season. aren't you looking forward

27.06.2025 05:01 — 👍 2    🔁 0    💬 0    📌 0

why do academics send and expect so much weekend email and work. not healthy

22.06.2025 06:10 — 👍 1    🔁 0    💬 0    📌 0

It's been 2.5 years but ANY SECOND NOW, right?

20.06.2025 12:41 — 👍 0    🔁 0    💬 0    📌 0

data indicates students don't like using it, sorry

19.06.2025 16:16 — 👍 0    🔁 0    💬 1    📌 0

computer scientists encountering the concept of "desirable difficulty"

19.06.2025 16:15 — 👍 0    🔁 0    💬 0    📌 0

remembering the time i checked in to my reasonably classy russian business hotel late with my wife, and the staff said "sir, this... girl.. not allowed"

she's a serious professor

we went through to the room, opened the balcony door, and buried a bottle of champagne in the metre of snow

good times

18.06.2025 06:56 — 👍 1    🔁 0    💬 0    📌 0
Login • Instagram Welcome back to Instagram. Sign in to check out what your friends, family & interests have been capturing & sharing around the world.

@jjvincent.bsky.social woah ur really famous! love this attack also. I automate and run it for a living

www.instagram.com/reel/DKz9ezj...

14.06.2025 06:06 — 👍 2    🔁 0    💬 0    📌 0

Michael... OK...

14.06.2025 05:01 — 👍 0    🔁 0    💬 0    📌 0

Great to see our work uncovering dangerous issues in commercial LLM "therapists" getting some coverage: futurism.com/stanford-the...

14.06.2025 04:01 — 👍 2    🔁 1    💬 0    📌 0

I have not updated since Christmas, I see. Guess I'd better put on some summer Bublé

09.06.2025 06:04 — 👍 1    🔁 0    💬 0    📌 0
The Internet Used to Be a Place
YouTube video by Sarah Davis Baker The Internet Used to Be a Place

www.youtube.com/watch?v=oYlc...

08.06.2025 10:11 — 👍 2    🔁 0    💬 1    📌 0

"natwirkung"

"wirk smorter nat horder"

accents dreamed up by the utterly deranged

(what is going on with that 🇺🇸 vowel sheft)

08.06.2025 10:05 — 👍 0    🔁 0    💬 0    📌 0

what is this photoshoot
delete this omg

05.06.2025 05:26 — 👍 1    🔁 0    💬 0    📌 0

i need you to understand that "alternate uses" is a terrible test/definition of creativity and has been for some time. it's extremely narrow, very shallow, and misses almost everything we know about creativity

03.06.2025 05:09 — 👍 0    🔁 0    💬 0    📌 0

i had a father in law once who did a talk like this called "Looking up Orion's skirt"

02.06.2025 17:39 — 👍 1    🔁 0    💬 0    📌 0
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3² + 4² = 5² ? big if true

21.05.2025 10:24 — 👍 1    🔁 0    💬 0    📌 0

ARE YOU SAYING IT'S A CON

15.05.2025 20:39 — 👍 1    🔁 0    💬 1    📌 0

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