Lorenz Breidenbach (@ethlorenz) header
Lorenz Breidenbach (@ethlorenz) profile picture

Lorenz Breidenbach

@ethlorenz

Yak Shaver and Security Researcher. Head of Research&Development at Chainlink Labs. Formerly at 🇨🇭 ETH Zürich, 🗽 Cornell Tech,⛓️ IC3.

lorenzb.com
Joined March 2018
  • Tweets260
  • Following483
  • Followers1.9K
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Photo by Lorenz Breidenbach (@ethlorenz)Photo by Lorenz Breidenbach (@ethlorenz)Photo by Lorenz Breidenbach (@ethlorenz)Photo by Lorenz Breidenbach (@ethlorenz)Photo by Lorenz Breidenbach (@ethlorenz)Photo by Lorenz Breidenbach (@ethlorenz)
Replying to @iseriohn42
@iseriohn42, congrats & welcome to @chainlinklabs‘ Research team! 🎉
Ari Juels (@AriJuels) profile pictureAri Juels@AriJuels14 Jul 2024
Congratulations to my (former) PhD student Yan Ji @iseriohn42, who has completed her dissertation defense and will soon officially be Dr. Ji! Yan has joined @chainlinklabs as a Research Engineer, so I'll have the good fortune of working with her for years to come.
Image from Ari Juels (@AriJuels)
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Godspeed, Ashley!
Ashley Stanhope (@AshleyStanhope) profile pictureAshley Stanhope
@AshleyStanhope24 Jun 2024
Some professional news: I am so excited to introduce my new company, Hardfork Media!
Image from Ashley Stanhope (@AshleyStanhope)
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I really enjoyed this year’s edition. Great research, people, and atmosphere!
IC3 (@initc3org) profile pictureIC3
@initc3org17 Jun 2024
IC3's 2024 Blockchain Camp has come to a close! Congrats to team "boquila" who won first place at this year's hackathon! 📷 We had a great turnout for the Camp and thank you to everyone who participated.
Image from IC3 (@initc3org)
Image from IC3 (@initc3org)
Image from IC3 (@initc3org)
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The title of this paper is just … *chef’s kiss* 🤌 arxiv.org/abs/2304.12749
Blockchain Large Language Models

Blockchain Large Language Models

This paper presents a dynamic, real-time approach to detecting anomalous blockchain transactions. The proposed tool, BlockGPT, generates tracing representations of blockchain activity and trains...

arxiv.org
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Finally
Deirdre Connolly¹ (@durumcrustulum) profile pictureDeirdre Connolly¹@durumcrustulum24 Jan 2023
Run, do not walk, to secure your apple / icloud account with a security key 🎉
Image from Deirdre Connolly¹ (@durumcrustulum)
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IACR Nerdcore from Zurich ❤️ m.youtube.com/watch?v=2uVsVY…
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If you gaze long into the orb, the orb also gazes into you.
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As one of the GasToken authors, I am strongly in favor of this proposal rendering GasToken ineffective by removing refunds for SSTORE and SELFDESTRUCT. github.com/ethereum/EIPs/pul…
Removal of refunds by vbuterin · Pull Request #3298 · ethereum/EIPs

Removal of refunds by vbuterin · Pull Request #3298 · ethereum/EIPs

Remove gas refunds for SSTORE and SELFDESTRUCT.

github.com
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Fun discussion about the security properties of reproducible builds
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And, of course, Twitter threading is broken. For the full discussion, go to nitter.gq/denergy_dtime/status/1… and scroll up :)
Marcus Müller (archive)– @funkylab@mastodon.social (@dEnergy_dTime) profile pictureMarcus Müller (archive)– @[email protected]@dEnergy_dTime25 May 2020
Replying to @tehjh @taviso @halvarflake @RichFelker @matthew_d_green @alexstamos @sleevi_ @durumcrustulum @LeaKissner
… and a lack of doability of verification means a lack of verification, or reduced update cycles.
This is embarrassingly bad
Sharon Goldberg (@goldbe) profile pictureSharon Goldberg@goldbe3 Apr 2020
“However, we find that in each Zoom meeting, a single AES-128 key is used in ECB mode by all participants to encrypt and decrypt audio and video.” ECB mode. That would be the mode that results in the visible encryption of the penguin. citizenlab.ca/2020/04/move-f…
Image from Sharon Goldberg (@goldbe)
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Rinkeby Faucet 0x9bCD3162694994f67d49A8ead6e5a196c9dD2fD2
Hey @Trezor, the first google (ad) result for “ledger vs trezor” is a scam.
Image from Lorenz Breidenbach (@ethlorenz)
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ETH plz 0x87002564F1C7b8F51e96CA7D545e43402BF0b4Ab
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Replying to @gakonst
@gakonst rocking the stage comparing different SNARKs at #zksummit
Image from Lorenz Breidenbach (@ethlorenz)
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Can anybody recommend highly credible CO2 offsetting or sequestration companies that market to consumers? Example scenario: I fly FRA-LAX and want to un-emit the resulting 1200kg CO2.
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WebAuthn via NFC is coming to iOS. (Finally!) yubico.com/2019/09/yubico-io…
Yubico iOS Authentication Expands to Include NFC

Yubico iOS Authentication Expands to Include NFC

iPhone users can now experience mobile tap-and-go authentication via NFC with a YubiKey 5 NFC or Security Key NFC by Yubico.

yubico.com
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A working conference WiFi, a working conference WiFi! My kingdom for a working conference WiFi!
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A group of @ETH_en CompSci students spent last week with Bloomberg’s security team in NYC. A big thanks to @jvanegue @realkpfleming @neverlastn and the other lovely folks at Bloomberg who worked together with us at @ETH_en to make this happen!
Tech At Bloomberg (@TechAtBloomberg) profile pictureTech At Bloomberg@TechAtBloomberg14 Jun 2019
The winners of the #BloombergCodeCon @ETH Zürich traveled to #NYC this week, where they worked with our Software Security Architecture team in the Office of the CTO, visited some of the sights in our wonderful city & even found some time to chat with @MikeBloomberg!
Image from Tech At Bloomberg (@TechAtBloomberg)
Image from Tech At Bloomberg (@TechAtBloomberg)
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cpu.fail/ More microarch side channels. Choice quote: "Ironically, the recent hardware countermeasures introduced by Intel in recent Coffee Lake Refresh i9 CPUs to prevent Meltdown make them more vulnerable to Fallout, compared to older generation hardware."
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Great argument/thread between @tqbf and @matthew_d_green. (Warning: it's loong)
Thomas H. Ptacek (@tqbf) profile pictureThomas H. Ptacek@tqbf15 Apr 2019
This is a clue that it's probably not a good idea to cite or name-check "Flash Boys", which is not a good book.
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