Privacy projectUmbra: Shielded wallet on Solana. Technology: garbled-circuit MPC.
Umbra is a private wallet and shielded pool on Solana, public since March 2026, and the clearest evidence yet that Arcium's encrypted execution engine can carry a consumer product. Send, receive and hold with balances and amounts hidden, in an interface that behaves like an ordinary wallet. Building the first real application on a new MPC layer is a harder engineering problem than it looks. It inherits the trust assumptions of that execution layer, which is still in alpha, and it serves Solana rather than the EVM environments most institutions integrate with first.
Key facts
- Entry type
- Privacy project
- Category
- Shielded wallet on Solana
- Technology
- Garbled-circuit MPC (MPC-GC)
- Website
- www.umbra.cash
What is garbled-circuit mpc?
Several parties jointly evaluate a function over encrypted inputs using garbled circuits and secret sharing, so no single party ever holds the plaintext.
How it compares with the other approaches on latency, trust assumptions and fit is set out, with sources, in the technology taxonomy.
Private by design.
See how confidential transactions work on the networks you already use.