Hannes Weissteiner's Avatar

Hannes Weissteiner

@hannesweissteiner.com.bsky.social

PhD Student at @isec-tugraz.bsky.social. Playing CTF with LosFuzzys

15 Followers  |  23 Following  |  3 Posts  |  Joined: 07.01.2025  |  1.4195

Latest posts by hannesweissteiner.com on Bluesky

Team picture

Team picture

Final scoreboard

Final scoreboard

Team dashboard

Team dashboard

We got 9th place at @defcon.bsky.social #CTF! Props to all finalists for an intense fight over the past three days and congrats to MMM for taking the win.

Thanks to Nautilus Institute for the neat setup this year, we had a blast.

Until next time, Vegas!

#DEFCON #DEFCON33

12.08.2025 02:04 — 👍 18    🔁 2    💬 2    📌 4

Thanks to @v4m1n.bsky.social , @supersingular.bsky.social, @notimaginary.bsky.social, Stefan Gast, @j4nw.bsky.social, @tom-crypt.bsky.social and @gruss.cc for the great collaboration!

13.06.2025 13:47 — 👍 6    🔁 0    💬 0    📌 0

It protects against fine-grained performance-counter attacks on TEE's, while keeping coarse-grained trends intact for legitimate use cases.

hannesweissteiner.xyz/pdfs/teecorr...

13.06.2025 13:47 — 👍 5    🔁 0    💬 1    📌 0

I am happy to announce that my first paper has been accepted at USENIX Security!

We propose TEEcorrelate, a mitigation that statistically decorrelates reported performance counters from real ones during TEE execution.

13.06.2025 13:47 — 👍 22    🔁 8    💬 2    📌 0

I'm very happy to announce our new Cohere+Reload: Re-enabling High-Resolution Cache Attacks on AMD SEV-SNP was accepted at DIMVA 2025!

In it @snee.la, @gruss.cc and I investigate AMD's ciphertext coherence mechanism and show even low resolution leakage can go a long way.
Paper preview: cr.giner.cc

03.04.2025 15:40 — 👍 16    🔁 5    💬 2    📌 1

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