Arcium Public Testnet Phase 2 is LIVE. The largest suite of encrypted apps on @solana.

.@WesternUnion was founded in 1851. 1861: built the first transcontinental telegraph line. 1871: launched the first electronic money transfer. 2025: decided to build on @solana, the financial engine of the internet. Soon: powered by C-SPL for confidential global payments.

<cypherpunk>

It's the final day of the @Solana Cypherpunk Hackathon. Developers and founders from across the world are now submitting the products they have been building over the past couple of months. Remember, today is not the end of your journey. It's just the beginning.

Nico’s full 1-hour workshop, “Building <encrypted> Apps,” can be found here: https://t.co/PdrnqTUwgo

How does Arcium work under the hood? Nico ( @cryptopapi997 ) explains:

Arcium transforms privacy from a niche, expert-only domain into something any developer can implement and any user can benefit from. By reducing complexity for builders and delivering a seamless experience for users, Arcium brings privacy into the mainstream of modern software.

https://t.co/GwWP8bnXXc

The first Developer Office Hours session starts in 1 hour! Open to all @colosseum Hackathon teams and anyone building on Arcium. Link to join below.

<> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <encrypted> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <> <>

Arcium is home to Solana’s privacy ecosystem.

@stealf_finance @UnchainProtocol @pythiamarkets @EllisiumLabs @subly_fi @triperappxyz The sidetrack also ends in one week. Submissions open until Oct 30 via @SuperteamEarn, with winners receiving prizes and hands-on support from Arcium. https://t.co/aGPZpCOVR3 https://t.co/2UmNaOZ9mX

The @colosseum Cypherpunk Hackathon ends in ONE week! Join our Developer Office Hours on Monday & Wednesday to connect with our engineers, ask questions, and get help finishing strong. It will be hosted in the Arcium Discord.

Everywhere I go... I see his face...

It was a lot of fun sharing my and @Arcium’s journey with the @incubator teams at the @solana office in NYC today! Incredibly bullish on these builders!

Encrypted Data with Arcium with Saitamacode_VN

@_arihantbansal But next up: We will have a workshop together with @SuperteamVN and @SaitamaCoder_VN at 2PM CET! We’ll walk through Arcium’s SDK flow — encrypting, uploading, and decrypting data — and how builders can leverage encrypted shared state in their apps. https://t.co/pW8SMlQeww

Arcium Workshop goes live in 3 hours on the Arcium Discord! Curious how to set up your own Arx Node? Arihant will show you the way.

A new token standard is coming to @solana Here’s how C-SPL, powered by @Arcium, enables encrypted capital markets:

We dropped the “HQ.” Just “Arcium” now — it's cleaner.