Mehdi Zerouali @ethzed

Co-founder & Director @sigp_io sigmaprime.io Sydney, Australia Joined July 2012

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Sigma Prime @sigp_io

6 months ago

It was a big few days at DSS for the Sigma Prime team. Proud to once again support this event as a sponsor and see our team contributing on stage. Shoutout to @ethzed, @kirkthebaird, @TheKnapsy, and @ToonVH_ Great sessions. If you missed them or want to rewatch, recordings below 🍿

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Devcon 8 | Mumbai, India 🇮🇳 @EFDevcon

7 months ago

Watch 'The Trillion Dollar Security initiative' with @fredrik0x of @ethereumfndn & @ethzed, Co-founder @sigp_io. From the Ethereum Day stage at Devconnect ARG. youtu.be/riTqxgJJsbY

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Sigma Prime @sigp_io

7 months ago

Despite having our hands full at @EFDevcon, we couldn’t resist sharing @jimmygchen's new blog exploring a Lighthouse–Reth integration 😮

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Devcon 8 | Mumbai, India 🇮🇳 @EFDevcon

7 months ago

"Ethereum envisions supporting billions of users and trillions in value, enabling individuals, institutions and governments to transact with confidence." - @fredrik0x & @ethzed Join Fredrik & Mehdi for “The Trillion Dollar Security Initiative” talk at the Ethereum Day.

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Ethereum Foundation @ethereumfndn

7 months ago

The Ethereum Foundation team will be speaking at Ethereum Day. Here’s what not to miss: > EF & Ethereum Updates by @hwwonx & @tkstanczak > A Protocol update by @barnabemonnot & @adietrichs > The Trillion Dollar Security Initiative by @fredrik0x & @ethzed & more Learn more: ethday.devconnect.org

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Sigma Prime @sigp_io

7 months ago

Sigma Prime turned nine last week 🎂 A remarkable journey so far and we’re just getting started. Huge thanks to everyone who makes SigP what it is, and to all our incredible clients and community!

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Sigma Prime @sigp_io

8 months ago

How does Quantum Key Distribution actually secure data? Let's break down the physics behind "unhackable" encryption 🧵

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Defi Security Summit @summit_defi

8 months ago

Ethereum hard forks can silently change smart contract behavior. At DSS, Toon Van Hove, Security Engineer at @sigp_io, explains how recent and upcoming forks like Pectra and Fusaka reshape security assumptions and what developers must know to stay safe.

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Devcon 8 | Mumbai, India 🇮🇳 @EFDevcon

8 months ago

Co-founder of @sigp_io and steward of Ethereum’s Trillion Dollar Security initiative, Mehdi Zerouali has helped make Ethereum one of the most secure networks. Excited to have @ethzed as a speaker for Ethereum Day! 🗓 Nov 17 📍 La Rural

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Sigma Prime @sigp_io

9 months ago

Think implementing nonces is simple? Think again. Whether you're building onchain protocols or offchain infrastructure, proper nonce implementation is one of the trickiest parts of cryptographic security. Let's dive into why replay protection is harder than it looks 👇

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Sigma Prime @sigp_io

9 months ago

We've released Lighthouse v8.0.0-rc.0! The next Ethereum upgrade Fusaka is coming to testnets! 🎉 This upgrade is a major step forward for scaling L2s with more blobs 🦓 If you’re running a holesky / hoodi / sepolia testnet node, you must upgrade before the fork.

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Sigma Prime @sigp_io

9 months ago

A Security Auditor’s Guide to reviewing @SuccinctLabs's SP1 programs. Practical audit patterns, input validation checklist, 32‑bit pitfalls, third‑party deps, overflow checks. For security engineers reviewing SP1/Risc0 guest code. blog.sigmaprime.io/sp1-zkvm-secur…

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Sigma Prime @sigp_io

9 months ago

We just wrapped up a security review of @berachain's dual execution client implementation using Reth SDK + Go-Ethereum for their BRIP-0004 enshrined rewards system. 🛡️ Client diversity wins: ➡️ Differential fuzzing between bera-reth & bera-geth caught consensus bugs that would've caused non-determinism in CometBFT ➡️ Cross-client validation revealed edge cases hard to detect in single-client development ➡️ Alternate language approaches exposed implementation gaps before mainnet 💡@paradigm Reth SDK shines here: ✅ Built fully custom execution layer with enshrined system calls ✅ No need to fork/maintain an entire codebase - pure modularity ✅Granular component customisation (consensus, EVM, RPC, tx pool) ✅ Production-ready (powers Base, Gnosis, BSC implementations) This is client diversity doing its job - catching bugs that matter. 🚀

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Defi Security Summit @summit_defi

9 months ago

Next DSS Webinar: Trillion Dollar Security (1TS) initiative by @ethereumfndn, on Sep 23 12:30PM UTC • Speakers: Fredrik (@Fredrik0x) from EF (@ethereumfndn), Mehdi Zerouali (@ethzed) Cofounder, Sigma Prime (@sigp_io) • Moderator: @0xRajeev from @TheSecureum Info & Register⬇️

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Sigma Prime @sigp_io

10 months ago

📖 New blog post out, written by @larkan_gareth The Economics of MEV in Cross-Chain Bridge Exploits: A Game-Theoretic Analysis Check it out below 👇

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Sigma Prime @sigp_io

10 months ago

📖 Our latest blog covers Pectra's Impact on Smart Contract Security, written by @ToonVH_ Check it out below 👇

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Sigma Prime @sigp_io

10 months ago

🔬 Thread: Why the @boundless_xyz zkVM approach to Ethereum consensus verification matters (and the security challenges we found) Traditional cross-chain bridges require trust assumptions. "The Signal: Ethereum" by Boundless eliminates this through cryptographic proofs, but the devil's in the details...

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Sigma Prime @sigp_io

11 months ago

Ever stared at 500k+ lines of blockchain node code wondering where to even start? We've been there. Reviewing core node implementations can be particularly challenging due to their complexity and scale.

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Sigma Prime @sigp_io

11 months ago

Lighthouse v7.1.0 Fantabulous is out! This is an exciting release packed with major improvements: 📉 Hierarchical state diffs are now in the hot DB - reducing disk I/O by 4x during normal ops and using 10x less space during non-finality. ⛽ Default gas limit bumped to 45M - following extensive analysis by core devs to safely raise L1 throughput. 🔦 Light client updates are now gossiped by sync committee validator nodes, boosting light client data availability. Full release notes: github.com/sigp/lighthous…