Nounours ☂️

Explorer. Privacy enthusiast @arcium | @MIT

[Nounours ☂️ @lab100x]

I’ve been digging @Arcium ☂️, and the simplest way I understand it is this:

Arcium is trying to make confidential computation usable inside Solana apps.

It is compute over private data, powered by MPC.

☂️🧵 [ Long ahh thread ]

[Uniswap @Uniswap]

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[Nounours ☂️ @lab100x]

@glasel @RobinhoodApp 🔥🔥🔥

[Glasel 🧊 @glasel]

https://t.co/OF2nJDugXM

[Nounours ☂️ @lab100x]

@creekontg Crazy

[Nounours ☂️ @lab100x]

@_Shadow36 gm

[Kintara @PlayKintara]

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3 winners will each get 40,000 KINS (~7 SOL / $500)

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[Nounours ☂️ @lab100x]

☂️ Arcium is cool because it brings a missing primitive to Solana:

trustless confidential computation.

[Nounours ☂️ @lab100x]

☂️ For DeFi:

Arcium could support confidential order flow, private strategy execution, sealed auctions, hidden liquidation logic, and anti-front-running systems.

For AI, it could support private inference or collaborative model workflows.

[Nounours ☂️ @lab100x]

☂️ For launchpads, I think Arcium is especially interesting.

A memecoin launch could use Arcium for sealed buy commitments, private anti-whale checks, confidential creator allocation verification, and fair batch allocation.

The bonding curve can stay public.

[Nounours ☂️ @lab100x]

☂️ The thing I like about Arcium is that it gives Solana developers a new design space.

Today, most Solana apps assume public state.

With Arcium, apps can have:

private inputs, public outputs, private intermediate logic, confidential scoring, hidden allocation etc

[Nounours ☂️ @lab100x]

☂️ The hard part of Arcis is that MPC circuits have constraints.

You cannot think like a normal backend developer.

Dynamic types, unbounded control flow, and secret-dependent execution patterns become dangerous or expensive.

This is where Arcium is powerful!

[Nounours ☂️ @lab100x]

☂️ Arcium’s developer stack is also interesting.

The confidential logic is written in Arcis, a Rust-based framework for MPC circuits.

But this is not normal Rust.

You are writing code that becomes a circuit, so the mental model is different.

[Nounours ☂️ @lab100x]

☂️ The docs describe misbehavior detection and slashing as core parts of the network.

Nodes that cheat, fail to participate, abort work, or submit bad results can be detected and penalized.

That matters because confidential compute needs accountability, not just encryption.

[Nounours ☂️ @lab100x]

☂️ Arcium’s security model is not “trust this server.”

It is closer to:

Trust the protocol, the MPC assumptions, the cluster configuration, economic penalties, and the existence of honest participants.

That is much more crypto-native.

[Nounours ☂️ @lab100x]

��️ interesting parts?

Public/ non-permissioned clusters can include a randomly selected node to reduce collusion risk.

The docs frame this as part of Arcium’s Sybil-resistance strategy, combined with Proof of Stake, reputation, community monitoring, and slashing.

[Nounours ☂️ @lab100x]

☂️ The docs make it clear that clusters are not one-size-fits-all.

There can be fully permissioned clusters, partially permissioned clusters, and public/non-permissioned clusters.

That means Arcium can target both crypto-native apps and enterprise-style confidential workloads.

[Nounours ☂️ @lab100x]

☂️ Arcium is not “just run everything privately.”

That would be bad design.

The better pattern is:

Keep public things public.

Use Arcium only where information leakage creates exploitation.

Ex: hidden risk checks, private voting, confidential AI inference, anti-MEV logic.

[Nounours ☂️ @lab100x]

☂️ What I find cool is that Arcium separates concerns cleanly:

Solana coordinates.

Arx nodes compute.

Clusters provide execution capacity.

MXEs isolate confidential environments.

Arcis lets developers write MPC circuits.

Modularity = privacy peaked.

[Nounours ☂️ @lab100x]

☂️ The second key concept is the Arx node.

Arx nodes are the worker nodes that actually participate in confidential computation.

They declare hardware capabilities, hold key shares, participate in clusters, and are economically incentivized to behave correctly.

[Nounours ☂️ @lab100x]

☂️ The third key concept is the Cluster.

A cluster is a group of Arx nodes that collaborate to execute confidential computations.

Computation customers can define requirements like compute capacity, active node requirements, security standards, and reputation needs.